Here are a few details of what we see on the print page.
The up arrow would be a "shift" key. The 'clover' is the Apple "command" key on an Apple keyboard (functions like the windows key on a PC). The "T" would be ... "T". The chord would then be "shift -command-T" which would open the "Create Table" window (the next window page 116).
The right arrows indicate cascading menus. Dragging a mouse over the right arrow would open a cascading menu.
The "Create Table" window has a few 'spinner boxes'. A person can type a number into the box or use the up and down arrows to increase of decrease a number in the box. Ditto "Columns".
The next 2 blacked out buttons are "CANCEL" and "OK" (The OK button is highlighted.)
If the questions are like those in the page you attached, the information you need to give is fairly basic. You don't need to show all of the "spinner" boxes, clovers, arrows, etc. What you do need is the choices offered in the two different menus shown. Some of your information can be handled with a transcriber's note such as describing the menu bar on which the table menu resides. Computer Braille Code is not needed because none of this requires input by the user -- it's about choosing among options.