HP 54540 Series - Horizontal

Time/Div Softkey 4-4
Delay Softkey 4-5
Pan and Zoom 4-6
Reference Softkey 4-11
Repetitive/Real-Time Softkey 4-12
Memory Bar 4-21
Sequential Softkey 4-23
Sample Clock Softkey 4-29
Record Length Softkey 4-30
Horizontal