Turn on/off subscript

`Ctrl` + `+` + `=`

All hotkeys for Microsoft Visio 2016 (Windows)

Select Various Tool/Shape Shortcuts Select Painter Tool	`Ctrl` + `1`
Select Various Tool/Shape Shortcuts Select Text Tool	`Ctrl` + `2`
Select Various Tool/Shape Shortcuts Select Connector Tool	`Ctrl` + `3`
Select Various Tool/Shape Shortcuts Select Pencil Tool	`Ctrl` + `4`
Select Various Tool/Shape Shortcuts Select TextBox Tool	`Ctrl` + `Shift` + `4`
Select Various Tool/Shape Shortcuts Select the freedom Tool	`Ctrl` + `5`
Select Various Tool/Shape Shortcuts Select Line Tool	`Ctrl` + `6`
Select Various Tool/Shape Shortcuts Select Arc Tool	`Ctrl` + `7`
Select Various Tool/Shape Shortcuts Select Rectangle Tool	`Ctrl` + `8`
Select Various Tool/Shape Shortcuts Select Ellipse Tool	`Ctrl` + `9`
Select Various Tool/Shape Shortcuts Select Crop Tool	`Ctrl` + `Shift` + `2`
Select Various Tool/Shape Shortcuts Switch format painter on/off	`Ctrl` + `Shift` + `P`
Select Various Tool/Shape Shortcuts Rename the shape	`F2`
Select Various Tool/Shape Shortcuts Find Shape	`Ctrl` + `F`
Select Various Tool/Shape Shortcuts Replace Shape	`Ctrl` + `H`
Select Various Tool/Shape Shortcuts Copy,Paste and Cut respectively Shape	`Ctrl` + `C` / `Ctrl` + `V` / `Ctrl` + `X`
Select Various Tool/Shape Shortcuts Delete the selected shape	`Del`
Select Various Tool/Shape Shortcuts Nudge selected Shape by 1 px	`Shift` + `Arrow Keys`
Format text Open the home tab	`Alt` + `H`
Format text Open text dialog box	`F11`
Format text Open format task pane	`F3`
Format text Open the snap & glue features	`Alt` + `F9`
Format text Align text left	`Ctrl` + `Shift` + `L`
Format text Align text right	`Ctrl` + `Shift` + `R`
Format text Align text center horizontally	`Ctrl` + `Shift` + `C`
Format text Justify text horizontally	`Ctrl` + `Shift` + `J`
Format text Top-Align text Vertically	`Ctrl` + `Shift` + `T`
Format text Align text center vertically	`Ctrl` + `Shift` + `M`
Format text Bottom align text vertically	`Ctrl` + `Shift` + `V`
Format text Move one word to the left	`Ctrl` + `Left Arrow`
Format text Move one word to the right	`Ctrl` + `Right Arrow`
Format text Select or cancel a character to the left	`Shift` + `Left Arrow`
Format text Select or cancel a character to the right	`Shift` + `Right Arrow`
Format text Select or cancel a word to the left	`Ctrl` + `Shift` + `Left arrow`
Format text Select or cancel a word to the right	`Ctrl` + `Shift` + `Right Arrow`
Format text Update the file	F5
Format text Display shortcut menu for selected item	`Shift` + `F10`
Format text Select all text	`Ctrl` + `A`
Format text Turn on /off Bold	`Ctrl` + `B`
Format text Turn on/off underline	`Ctrl` + `U`
Format text Turn on/off Italic	`Ctrl` + `I`
Format text Turn on/off double underline	`Ctrl` + `Shift` + `D`
Format text Turn on/off all caps	`Ctrl` + `Shift` + `A`
Format text Turn on/off small caps	`Ctrl` + `Shift` + `K`
Format text Turn on/off subscript	`Ctrl` + `+` + `=`
Format text Turn on/off superscript	`Ctrl` + `Shift` + `=`
Format text Increase font size	`Ctrl` + `Shift` + `>`
Format text Reduce font size	`Ctrl` + `Shift` + `<`
Window/Navigation Shortcut Move to the beginning	`Home`
Window/Navigation Shortcut Move to the end of entry	`End`
Window/Navigation Shortcut Full screen view	`F5`
Window/Navigation Shortcut Exit Full screen view	`Esc`
Window/Navigation Shortcut Open the next page in drawing	`PgDn`
Window/Navigation Shortcut Open the previous page in drawing	`PdUp`
Window/Navigation Shortcut Zoom in	`Alt` + `F6`
Window/Navigation Shortcut Zoom out	`Alt` + `Shift` + `F6`
Window/Navigation Shortcut Fit to window	`Ctrl` + `Shift` + `W`
Window/Navigation Shortcut Switch window in app	`Alt` + `Tab`
Window/Navigation Shortcut Close the current window	`Alt` + `F4`
Window/Navigation Shortcut Maximize the selected window	`Ctrl` + `F10`
Window/Navigation Shortcut Restore the size of visio program	`Ctrl` + `F5`
Window/Navigation Shortcut Display shortcut menu	`Alt` + `Spacebar`
Window/Navigation Shortcut Move between shapes/text	`Arrow Keys`
Window/Navigation Shortcut Open help window	`F1`
Window/Navigation Shortcut Close help window	`Alt` + `F4`
Window/Navigation Shortcut Go back to Visio 16 Home	`Alt` + `Home`
Window/Navigation Shortcut Cycle through open drawings	`Ctrl` + `Tab`
File Operation Save Diagram	`Ctrl` + `S`
File Operation Open existing diagram	`Ctrl` + `O`
File Operation Open the page dialog box	`Shift` + `F4`
File Operation Open the recorder pages in dialog box	`Ctrl` + `Alt` + `P`
File Operation Undo Changes	`Ctrl` + `Z`
File Operation Copy the picture from screen	`PrtScn`
File Operation Copy the picture from selected window	`Alt` + `PrtScn`