If the selected command is a gallery, to select the command, press the Spacebar or Enter. Then, tab through the items.

1. To select the object you want, press Tab or Shift+Tab

2. To open the shortcut menu, press Shift+F10

3. To select Worksheet Object, press the Down Arrow key until it's selected

4. To select Edit, press the Right Arrow key and then press Enter

Note: The name of the command in the shortcut menu depends on the type of embedded or linked object. For example, an embedded Microsoft Office Excel worksheet has the command Worksheet Object, whereas an embedded Microsoft Office Visio Drawing has the command Visio Object.

Note: The cursor must be between words to do this.

To reorder sections of slides in a slide deck:

Use the Insert Comment command (Alt+N then L) to open the Comments Pane before using these keyboard shortcuts.

For more information about assigning custom keyboard shortcuts to menu items, recorded macros, and Visual Basic for Applications etc., hit the source link below.

Source: Microsoft Office Support