Commonly used commands in the project such as select all, copy, distance are given as vertical toolbars on the left side of the program. If you want, you can reflect your own layout to the vertical toolbar, and add the commands you use frequently to the vertical toolbar with customization.
When the vertical toolbar disappears or you close it , you can bring it back with the Show Toolbars command.
Location of Show Toolbars Command
You can access the Show toolbars command from the View tab Window title.
With the vertical toolbar open in the program:
With the vertical toolbar closed in the program: