Which of the following is NOT a valid hotkey combination for timeline operations?

Which of the following is NOT a valid hotkey combination for timeline operations?

• A. Ctrl Alt LMB
• B. Ctrl Alt RMB
• C. Ctrl Alt MMB
• D. Ctrl Alt Ctrl LMB

Answer: (D)

Hotkeys for timeline actions are built from a combination of keyboard modifiers and a mouse button, using each element only once in that combo. A valid hotkey should specify two distinct modifiers (like Ctrl and Alt) along with a mouse button (left, right, or middle). You can’t repeat a modifier in the same combo. The option that repeats Ctrl (Ctrl Alt Ctrl LMB) tries to press Ctrl twice at the same time, which isn’t a valid single hotkey definition. That’s why it isn’t a valid timeline hotkey. The other options pair two different modifiers (Ctrl and Alt) with a distinct mouse button, which fits the standard pattern for timeline hotkeys.

Hotkeys for timeline actions are built from a combination of keyboard modifiers and a mouse button, using each element only once in that combo. A valid hotkey should specify two distinct modifiers (like Ctrl and Alt) along with a mouse button (left, right, or middle). You can’t repeat a modifier in the same combo.

The option that repeats Ctrl (Ctrl Alt Ctrl LMB) tries to press Ctrl twice at the same time, which isn’t a valid single hotkey definition. That’s why it isn’t a valid timeline hotkey. The other options pair two different modifiers (Ctrl and Alt) with a distinct mouse button, which fits the standard pattern for timeline hotkeys.