Click the Office Symbol at the top right of the program.
Click “Word Options.”
Select the “Customize Tab.”
Click the “Customize” button at the bottom of the window next to “Keyboard Shortcuts.”
Select the “Macros” category in the box on the left.
Locate the Zotero items in the box on the right and select one to assign a keyboard shortcut.
If it already has a shortcut it will show in the “Current Keys” box.
To assign one, place the cursor in the “Press new shortcut key” field.
Press the keyboard combination you want to assign, e.g. when assigning a combination to add a new Zotero citation, press ctrl-alt-A
If the “Currently assigned to” field says “[unassigned]”, you can use this shortcut without any conflicts with other commands.
Repeat the process for the other Zotero commands.