BSL PRO 4 Manual - Biopac

Part C — Analysis Functions 229Edit menu functionality during acquisitionThe following Edit menu functions may move or alter memory and cannot be performed during acquisition:Undo, Cut, Clear, Clear All, Paste, Insert Waveform, Duplicate waveform, and Remove Waveform.Undo / Can’t undoThe Undo command allows you to restore data that was unintentionally deleted or modified. Undo applies toediting commands and transformations (such as digital filtering and mathematical operations).There are some important exceptions to the Undo command.First, neither Edit > Clear all nor Edit > Remove waveform can be undone. It is a good idea to make backupfiles before performing any editing, especially when using these commands.Second, changes in the display options (i.e., changing the horizontal scale or changing the color of awaveform) cannot be undone, since they are easier to manipulate and less drastic than cutting data out of awaveform. If you modify the screen scale (or other display parameters) you will still be able to undo yourlatest data modification, which is much more difficult to recover than a screen parameter change.TIP: If you accidentally remove a waveform or choose Clear All, one way torecover the data is to close the file without saving the changes. The data filecan now be reopened, as it was when it was last saved; any changes made sinceit was last saved will be lost.Perform multiple levels of undo on a per graph basis; Journal undo remains unchanged at one step. Complexdata analysis in BSL PRO is rarely performed with a single transformation; multiple transformations arefrequently cascaded together to produce a result. BSL PRO will “stack” the transformations and the user willbe able to undo one step at a time until this stack is exhausted. Undo may move or alter memory and cannot be performed during acquisition. Undo operations may occupy large amounts of memory, particularly for transformations that affectentire waveforms or multiple events. Users without large amounts of RAM or working with large datasets may require the available computer memory for performing transformations. To accommodatethese users, the maximum size of the undo stack can be limited using the Levels of undo Preference(Display > Preferences).BSL PRO Manual