From Headus Docs

[edit] Conventions Used in This Guide

"Tap/Type/Use the <X> key" : press and quickly release the X key on the keyboard.

"Type <X><Y>" : press and release the X key, then press and release the Y key.

"Hold the <X> key" : press and only release the X key once the desired operation is complete.

"<Shift-X>" : first press and hold the Shift key, then tap or hold the X key.

"<Ctrl-X>" : as above, but with the Ctrl key.

"Click the <LMB>" : click the left mouse button once.

"Double click the <LMB>" : click the left mouse button twice, quickly.

"Drag the <LMB>" : press and hold the left mouse button while dragging the mouse.

"<Ctrl-LMB>" : first press and hold the Ctrl key, then do the left mouse button click or drag.

"<MMB>" : middle mouse button, or the right mouse button if you only have a 2 button mouse.

"<RMB>" : right mouse button.