diff --git a/package.json b/package.json
index aca60f0..3e13f06 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "modern_spreadsheet",
   "private": false,
-  "version": "0.0.21",
+  "version": "0.0.23",
   "exports": {
     ".": {
       "import": "./dist/main.js",
diff --git a/src/components/editor.ts b/src/components/editor.ts
index 68a4d6f..e0a5bbf 100644
--- a/src/components/editor.ts
+++ b/src/components/editor.ts
@@ -1,4 +1,4 @@
-import Spreadsheet from "../main";
+import Spreadsheet, { CSS_PREFIX } from "../main";
 import { Position } from "../modules/cell";
 import { RenderBox } from "../modules/renderBox";
 
@@ -8,7 +8,7 @@ export class Editor {
     constructor(root: Spreadsheet) {
         this.root = root
         const element = document.createElement('input')
-        element.classList.add('editor')
+        element.classList.add(CSS_PREFIX + 'editor')
         this.element = element
         this.hide()
     }
@@ -19,11 +19,11 @@ export class Editor {
         this.element.blur()
         window.removeEventListener('click', this.handleClickOutside)
         this.element.removeEventListener('keydown', this.handleKeydown)
-        
+
         this.root.focusTable()
     }
 
-    show(position: Position) {
+    show(position: Position, initialString?: string) {
         const { height, width, x, y } = new RenderBox(this.root.config, position);
         const cell = this.root.getCell(position)
         this.element.classList.remove('hide')
@@ -36,15 +36,17 @@ export class Editor {
 
         window.addEventListener('click', this.handleClickOutside)
         this.element.addEventListener('keydown', this.handleKeydown)
-        this.element.value = cell.value
+        this.element.value = initialString ? initialString : cell.value
         this.element.focus()
-        this.element.select()
+        if (!initialString) this.element.select()
+
+
     }
 
-    handleKeydown = (event: KeyboardEvent) =>  {
-        const {key} = event
-        
-        switch(key) {
+    handleKeydown = (event: KeyboardEvent) => {
+        const { key } = event
+
+        switch (key) {
             case 'Escape': {
                 this.hide();
                 break;
diff --git a/src/components/scroller.ts b/src/components/scroller.ts
index fb692f0..60aa2ab 100644
--- a/src/components/scroller.ts
+++ b/src/components/scroller.ts
@@ -1,4 +1,4 @@
-import Spreadsheet from "../main"
+import Spreadsheet, { CSS_PREFIX } from "../main"
 
 export interface ViewportRect {
     top: number
@@ -107,11 +107,15 @@ export class Scroller {
                 }
             }
         }
+        const keysRegex = /^([a-z]|[а-я])$/
         if (!event.metaKey && !event.ctrlKey) { //* Prevent handle shortcutrs
-            if (event.key === 'F2' || /^([a-z]|[а-я])$/.test(event.key.toLowerCase())) { //* English and Russian keyboard. Or F2 button
+            const isPressedLetterKey = keysRegex.test(event.key.toLowerCase()) 
+
+            if (event.key === 'F2' || isPressedLetterKey) { //* English and Russian keyboard. Or F2 button
                 event.preventDefault()
                 if (!this.root.selection.selectedCell) return;
-                this.root.showEditor(this.root.selection.selectedCell)
+                
+                this.root.showEditor(this.root.selection.selectedCell, isPressedLetterKey ? event.key : undefined)
             }
         }
 
@@ -177,7 +181,7 @@ export class Scroller {
         this.verticalScroller = verticalScroller
         this.horizontalScroller = horizontalScroller
         scroller.appendChild(groupScrollers)
-        scroller.classList.add('scroller')
+        scroller.classList.add(CSS_PREFIX + 'scroller')
 
         return { scroller, verticalScroller, horizontalScroller }
     }
diff --git a/src/components/sheet.ts b/src/components/sheet.ts
index 7367d39..d64f524 100644
--- a/src/components/sheet.ts
+++ b/src/components/sheet.ts
@@ -1,4 +1,4 @@
-import Spreadsheet from "../main"
+import Spreadsheet, { CSS_PREFIX } from "../main"
 import { Position } from "../modules/cell"
 
 /**
@@ -11,7 +11,7 @@ export class Sheet {
     constructor(root: Spreadsheet) {
         this.root = root
         const canvas = document.createElement('canvas')
-        canvas.classList.add('sheet')
+        canvas.classList.add(CSS_PREFIX + 'sheet')
 
         //* Set up canvas sizes based on provided root config
         canvas.height = this.root.config.view.height
diff --git a/src/components/table.ts b/src/components/table.ts
index 903b188..e4cf6d2 100644
--- a/src/components/table.ts
+++ b/src/components/table.ts
@@ -1,4 +1,4 @@
-import Spreadsheet from "../main"
+import Spreadsheet, { CSS_PREFIX } from "../main"
 import { ViewProperties } from "../modules/config"
 
 /** Base (root) component */
@@ -8,7 +8,7 @@ export class Table {
     constructor(root: Spreadsheet) {
         this.root = root
         const container = document.createElement('div')
-        container.classList.add('spreadsheet_container')
+        container.classList.add(CSS_PREFIX + 'spreadsheet_container')
         this.element = container
 
         this.changeElementSizes(this.root.viewProps)
diff --git a/src/components/toolbar.ts b/src/components/toolbar.ts
index b75e668..8dfdef0 100644
--- a/src/components/toolbar.ts
+++ b/src/components/toolbar.ts
@@ -1,4 +1,4 @@
-import Spreadsheet from "../main"
+import Spreadsheet, { CSS_PREFIX } from "../main"
 
 export class Toolbar {
     element: HTMLDivElement
@@ -6,7 +6,7 @@ export class Toolbar {
     constructor(root: Spreadsheet) {
         this.root = root
         const toolbarElement = document.createElement('div')
-        toolbarElement.classList.add('toolbar')
+        toolbarElement.classList.add(CSS_PREFIX + 'toolbar')
         this.element = toolbarElement
     }
 }
\ No newline at end of file
diff --git a/src/index.ts b/src/index.ts
index e1891f3..72c5ca9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -24,3 +24,11 @@ function loadDataFromLS() {
 
 saveButton.addEventListener('click', saveDataToLS)
 loadButton.addEventListener('click', loadDataFromLS)
+sheet.changeCellStyles({column: 1, row: 1}, {
+    background: 'black',
+    borderColor: 'white',
+    fontColor: 'white',
+    fontSize: 20,
+    selectedBackground: 'green',
+    selectedFontColor: 'black'
+})
\ No newline at end of file
diff --git a/src/main.ts b/src/main.ts
index 9122bd4..16b34e1 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -4,7 +4,7 @@ import { Scroller } from "./components/scroller";
 import { Sheet } from "./components/sheet";
 import { Table } from "./components/table";
 import { Toolbar } from "./components/toolbar";
-import { Cell, CellConstructorProps, Position, SerializableCell } from "./modules/cell";
+import { Cell, CellConstructorProps, CellStyles, Position, SerializableCell } from "./modules/cell";
 import { Config, ViewProperties } from "./modules/config";
 import { RangeSelectionType, Selection } from "./modules/selection";
 import { Styles } from "./modules/styles";
@@ -32,6 +32,8 @@ interface SpreadsheetConstructorProperties {
     view?: ViewProperties
 }
 
+export const CSS_PREFIX = "modern_sc_"
+
 export default class Spreadsheet {
     private table: Table
     private scroller: Scroller
@@ -115,7 +117,7 @@ export default class Spreadsheet {
         content.appendChild(this.header.element)
         content.appendChild(this.sheet.element)
 
-        content.classList.add('content')
+        content.classList.add(CSS_PREFIX + 'content')
 
         this.table.element.appendChild(this.toolbar.element)
         this.table.element.appendChild(content)
@@ -175,6 +177,12 @@ export default class Spreadsheet {
         this.renderCell(row, column)
     }
 
+    changeCellStyles(position: Position, styles: CellStyles) {
+        const { column, row } = position
+        this.data[row][column].changeStyles(styles)
+        this.renderCell(row, column)
+    }
+
     applyActionToRange(range: RangeSelectionType, callback: (cell: Cell) => any): void {
         const fromRow = Math.min(range.from.row, range.to.row)
         const toRow = Math.max(range.from.row, range.to.row)
@@ -211,8 +219,8 @@ export default class Spreadsheet {
         }
     }
 
-    showEditor(position: Position) {
-        this.editor.show(position)
+    showEditor(position: Position, initialString?: string) {
+        this.editor.show(position, initialString)
     }
 
     renderSheet() {
@@ -238,7 +246,8 @@ export default class Spreadsheet {
                     displayValue: cell.displayValue,
                     position: cell.position,
                     resultValue: cell.resultValue,
-                    value: cell.value
+                    value: cell.value,
+                    style: cell.style
                 }))
             }
             formattedData.push(innerRow)
diff --git a/src/modules/cell.ts b/src/modules/cell.ts
index f4a0890..dac0b3b 100644
--- a/src/modules/cell.ts
+++ b/src/modules/cell.ts
@@ -6,6 +6,7 @@ export type CellConstructorProps = {
     displayValue: string
     resultValue: string
     position: Position
+    style: CellStyles | null
 }
 
 interface CellStylesConstructorProps {
@@ -48,7 +49,7 @@ export class SerializableCell {
     displayValue: string
     resultValue: string
     position: Position
-    style: CellStyles
+    style: CellStyles | null
     constructor(props: SerializableCell | SerializableCell) {
         this.value = props.value
         this.displayValue = props.displayValue
@@ -59,18 +60,21 @@ export class SerializableCell {
 }
 
 export class Cell {
+    /** True value (data) */
     value: string
+    /** Value to render */
     displayValue: string
     /** This refers to the values ​​​​that were obtained by calculations, for example, after calculating the formula  */
     resultValue: string
     position: Position
-    style: CellStyles = new CellStyles()
+    style: CellStyles | null = null
 
     constructor(props: CellConstructorProps) {
         this.value = props.value
         this.displayValue = props.displayValue
         this.resultValue = props.resultValue
         this.position = props.position
+        this.style = props.style
     }
 
     public getSerializableCell(): SerializableCell {
@@ -84,6 +88,10 @@ export class Cell {
         return cell
     }
 
+    changeStyles(styles: CellStyles) {
+        this.style = styles
+    }
+
     changeValues(values: Partial<Omit<CellConstructorProps, 'position'>>) {
         Object.assign(this, values)
     }
@@ -109,15 +117,17 @@ export class Cell {
         y -= root.viewport.top
         x -= root.viewport.left
 
+        const styles = this.style ?? root.styles.cells
+
         ctx.clearRect(x, y, width, height)
-        ctx.fillStyle = isCellSelected || isCellInRange ? this.style.selectedBackground : this.style.background
+        ctx.fillStyle = isCellSelected || isCellInRange ? styles.selectedBackground : styles.background
         ctx.strokeStyle = 'black'
         ctx.fillRect(x, y, width - 1, height - 1)
         ctx.strokeRect(x, y, width, height)
 
-        ctx.fillStyle = isCellSelected || isCellInRange ? this.style.selectedFontColor : this.style.fontColor
+        ctx.fillStyle = isCellSelected || isCellInRange ? styles.selectedFontColor : styles.fontColor
         ctx.textAlign = 'left'
-        ctx.font = `${this.style.fontSize}px Arial`
+        ctx.font = `${styles.fontSize}px Arial`
         ctx.textBaseline = 'middle'
         ctx.fillText(this.displayValue, x + 2, y + height / 2)
     }
diff --git a/src/modules/styles.ts b/src/modules/styles.ts
index 76a17b3..3207abf 100644
--- a/src/modules/styles.ts
+++ b/src/modules/styles.ts
@@ -1,4 +1,9 @@
+import { CellStyles } from "./cell";
 
 
 export class Styles {
+    cells: CellStyles
+    constructor() {
+        this.cells = new CellStyles()
+    }
 }
\ No newline at end of file
diff --git a/src/scss/_global.scss b/src/scss/_global.scss
index 7ea5983..e8007e4 100644
--- a/src/scss/_global.scss
+++ b/src/scss/_global.scss
@@ -1,4 +1,4 @@
 body {
     padding: 0px;
     margin: 0px;
-}
\ No newline at end of file
+}
diff --git a/src/scss/_spreadsheet.scss b/src/scss/_spreadsheet.scss
index 84b490c..0717913 100644
--- a/src/scss/_spreadsheet.scss
+++ b/src/scss/_spreadsheet.scss
@@ -1,25 +1,23 @@
+$css_prefix: "modern_sc_";
 
-
-.content {
+.#{$css_prefix}content {
     position: absolute;
     top: 0;
     left: 0;
 }
 
-.spreadsheet_container {
+.#{$css_prefix}spreadsheet_container {
     position: relative;
     isolation: isolate;
     border: 2px solid black;
-
-
 }
 
-.sheet{
+.#{$css_prefix}sheet{
     display: block;
     contain: strict;
 }
 
-.scroller {
+.#{$css_prefix}scroller {
     overflow: scroll;
     box-sizing: border-box;
     transform: translateZ(0);
@@ -28,13 +26,13 @@
     }
 }
 
-.editor {
+.#{$css_prefix}editor {
     position: absolute;
     box-sizing: border-box;
     font-size: 16px;
     font-family: Arial, Helvetica, sans-serif;
 }
 
-.hide {
+.#{$css_prefix}hide {
     visibility: hidden;
 }
\ No newline at end of file