What do you mean by CTRL?
CTRL's English is all called "control", the meaning of "controlling" in Chinese meaning, this key in the daily work will not be used alone, must be used in conjunction with other keys, and the use of a wide range.
Second, the role of the CTRL key
As mentioned earlier, the Ctrl key is used by a combination of keys, but the combination works differently for different software functions, such as: Ctrl+u, which is the function of viewing the source code in the Chrome browser, and is underlined in Word document editing, So to understand the role of CTRL, you have to understand how to use the CTRL key in different software environments, and the following lists the functions of the CTRL key for the commonly used software.
1), the role of the CTRL key in Windows environment
CTRL + a Select all (fonts, files, or folders)
Ctrl+b Sorting Favorites
CTRL + C copy (font, file, or folder)
Ctrl+d Add the current Web page to the Favorites folder
Ctrl+e open System or Internet search
Ctrl+f Find
Ctrl+i Favorites
Ctrl+l Open the Internet address of a typed document or folder
CTRL + N Create a new file or open the current Web page in a new window
Ctrl+o Open the Internet address of a typed document or folder
Ctrl+p Printing
Ctrl+r Refresh
Ctrl + V paste (font, file, or folder)
Ctrl+x Cut (font, file, or folder)
Ctrl+z undo (font, file, or folder)
Ctrl+shift Conversion Input Method
Ctrl+b Bold
Ctrl+u Underline
Ctrl+alt+end Fast Shutdown
Ctrl+esc Show Start Menu
Ctrl+space (space bar) switching Chinese Input method
Ctrl+shift+n new Folder
Ctrl+h View History actions
Ctrl+shift Create links
2), the function of the CTRL key in Word
CTRL + A (or CTRL + keypad number keys): Select the full text.
Ctrl+b: Make the selected text bold (press again, cancel bold).
CTRL + C: Copy the selected text to the Clipboard.
Ctrl+d: Opens the Font dialog box to quickly complete various settings for the font.
Ctrl+e: Centers the text of the line that contains the cursor.
Ctrl+f: Opens the Find and Replace dialog box and positions it on the Find tab.
Ctrl+g: Opens the Find and Replace dialog box and positions it on the Positioning tab.
Ctrl+h: Opens the Find and Replace dialog box and positions it on the Replace tab.
Ctrl+i: Make the selected text italic (and then press again to remove the skew).
Ctrl+k: Opens the Insert Hyperlink dialog box.
Ctrl+l: Aligns the text to the left of the line on which the cursor is located.
Ctrl+shift+l: Adds "Bullets" to the text of the line where the cursor is located.
Ctrl+m: Adds first row and hanging indent at the same time.
Ctrl+shift+m: Decreases the first row and the hanging indent at the same time.
CTRL + N: Create an empty document.
Ctrl+o (or CTRL+F12): Opens the Open dialog box.
Ctrl+p (or CTRL+SHIFT+F12): Opens the Print dialog box.
Ctrl+r: Aligns the text to the right of the line where the cursor is located.
Ctrl+s: Open the Save As dialog box for the new document, or save the current document.
Ctrl+t: Increases the first line indent.
Ctrl+shift+t: Reduce the first line indent.
Ctrl+u: Underline the selected text (press again, remove underline).
CTRL + V: Pastes text or pictures from the Clipboard at the cursor. If there is more than one content on the Clipboard, the last content is pasted at the cursor.
Ctrl+x: Cuts the selected text to the Clipboard.
Ctrl+z: Undo the action you just made (you can use it more than once).
Ctrl+0: Increases the spacing of the selected text by 12 points before each paragraph.
Ctrl+1: If the selected text spacing is not "single spacing", it is quickly set to single spacing.
Ctrl+2: Sets the selected text spacing to twice spacing.
Ctrl+5: Sets the selected text spacing to 1.5 times spacing.
CTRL+F2: Quickly perform the print preview feature.
CTRL+F4: Closes the current document and prompts you to save it.
Ctrl+f5: Restores the window to the state before it is maximized.
Ctrl+shift+f5: Opens the Bookmarks dialog box.
Ctrl+shift+f8: Activates the column selection feature, which is usually referred to as selecting the vertical block text (and then pressing the ESC key again, and canceling the function).
CTRL+F9: Inserts a field notation "{}" at the cursor (note: A pair of curly braces entered directly cannot be a field token).
Ctrl+delete: Deletes an English word or a Chinese word after the cursor (can be used repeatedly).
CTRL + BACKSPACE: Deletes an English word or a Chinese word (which can be reused) in front of the cursor.
Ctrl+enter: Moves the contents of the cursor to the next page quickly.
Ctrl+end: Quickly move the cursor to the end of the text.
Ctrl+home: Quickly move the cursor to the top of the text.
Ctrl+insert+insert (that is, press the Insert key twice): quickly open or change the task pane to the Clipboard status.
ctrl++: Quickly switch to subscript input status (and then restore to normal state again).
ctrl+shift++: Quickly switch to superscript input status (and then restore to normal state again).
ctrl+→: Moves the cursor backward by the English word or Chinese word interval.
ctrl+←: Move the cursor forward at intervals of English words or Chinese words.
3, Excel spreadsheet in the CTRL key function
CTRL+1 Displays the Format Cells dialog box.
Ctrl+2 applies or cancels bold formatting.
Ctrl+3 applies or suppresses italic formatting.
Ctrl+4 apply or remove the underline.
Ctrl+5 apply or remove a line.
Ctrl+6 toggles between hidden objects, display objects, and display object placeholders.
CTRL+7 Displays or hides the Standard toolbar.
Ctrl+8 Show or hide outline symbols.
Ctrl+9 hides the selected row.
Ctrl+0 hides the selected columns.
CTRL + A selects the entire worksheet. If the worksheet contains data, press CTRL + A to select the current range. Press CTRL + A again to select the entire worksheet. The Function Arguments dialog box is displayed when the insertion point is to the right of a function name in the formula.
When the insertion point is to the right of a function name in the formula, pressing CTRL+SHIFT+A inserts the parameter name and parentheses. Ctrl+b applies or cancels bold formatting.
CTRL + C copies the selected cells. If you press CTRL + two consecutive times, the Microsoft Office clipboard appears. Ctrl+d Use the fill down command to copy the contents and formatting of the topmost cell in the selection to the cells below.
CTRL+F Displays the Find dialog box. Pressing SHIFT+F5 also displays this dialog box, and pressing SHIFT+F4 repeats the last find action.
CTRL+G Displays the Locate dialog box. Pressing F5 also displays this dialog box.
CTRL+H Displays the Find and Replace dialog box.
Ctrl+i applies or suppresses italic formatting.
CTRL+K Displays the Insert Hyperlink dialog box for the new hyperlink, or displays the Edit Hyperlink dialog box for the selected existing hyperlink.
CTRL+L Displays the Create List dialog box.
CTRL + N creates a new, blank file.
Ctrl+o Displays the Open dialog box to open or locate the file.
Press Ctrl+shift+o to select all cells that contain annotations.
CTRL+P Displays the Print dialog box.
Ctrl+r Use the Fill Right command to copy the contents and formatting of the leftmost cell in the selected range to the right cell.
CTRL + V inserts the contents of the Clipboard at the insertion point and replaces any selection. You can use this shortcut only if you have cut or copied the object, text, or cell contents.
Ctrl+s saves the active file with its current file name, location, and file format. Ctrl+u apply or remove the underline.
Ctrl+w Closes the selected workbook window.
Ctrl+x cuts the selected cells.
Ctrl+y repeats the previous command or action, if possible.
Ctrl+z Use the Undo command to undo the previous command or delete the last entry you typed. When an AutoCorrect smart tag is displayed, press Ctrl+shift+z to undo or redo the last AutoCorrect action by using the Undo or repeat command.
CTRL + (unhide all hidden rows in the selection.)
CTRL +) Unhide all hidden columns in the selection.
ctrl+& applies the outer box to the selected cells.
Ctrl+_ deletes the outer border from the selected cells.
Ctrl+~ applies the general number format.
ctrl+$ applies a currency format with two-bit decimals (negative numbers are placed in parentheses).
ctrl+% applies the percent format without decimal places.
ctrl+^ applies an "exponential" format with two decimal places.
ctrl+# applies a date format with days, months, and years.
ctrl+@ applies a "time" format with hours and minutes and AM or PM.
ctrl+! Applies the value format with two-bit decimal, thousand separator, and minus sign (-) for negative values.
Ctrl+_ Displays the Delete dialog box for removing the selected cells.
Ctrl+* selects the current range that surrounds the active cell (the data area enclosed by blank rows and blank columns). In a PivotTable report, it selects the entire PivotTable report.
CTRL +: Enter the current time.
CTRL +; Enter the current date.
CTRL + ' Toggle the display of cell values and formulas on the worksheet.
CTRL + ' copies the formula from the cell above the active cell to the cell or the edit bar.
CTRL + "Copies the value from the cell above the active cell to the cell or the formula bar.
ctrl++ Displays the Insert dialog box for inserting blank cells.