Canvas uses memory to store operations so they can be undone. The amount of memory depends on the operation. For example, undoing a filter applied to a 2 MB image requires significantly more memory than reversing a change in type size. Canvas allocates memory to ensure that you can undo the specified minimum number of actions. Canvas tries to set aside enough mem- ory so you can undo the specified maximum number of actions. It uses this memory if it’s needed for other operations. Therefore, you should be able to undo the specified minimum number of actions, but you might not be able to undo the specified maximum number of actions. The memory allocation ensures that you’ll have the most memory available in Canvas. Freeform Selection Lets you place objects in freeform mode by clicking already-selected objects. Otherwise, you must use the Effects > Freeform command to put an object in freeform mode. Retain Selected Tool Keeps the current tool selected after you use it, instead of reverting to the Selection tool. No Background Updates Prevents Canvas from redrawing open Canvas documents when you are working in another application. This option lets other applications run faster when Canvas is in the background. Dither Colors Provides the best onscreen color representation, but requires more system memory. If you are using Canvas for Mac OS, this option requires 32-bit color capabilities. Select Across Visible Layers Lets you select objects on all visible layers in a document, rather than just the active layer. Note: If this option is off, you can still select objects on other visible layers by pressing Tab and clicking the objects. Fit to Window Opens documents so the full layout area can be seen in the center of the window. When this option is off, documents open in Home View (100% magnification with the upper-left corner of the page in the upper-left corner of the window). Maximize on Opening Opens documents at full screen size. Oth- erwise, documents open at a standard size that fits any monitor, but might not fill the screen completely. Create backup when saving Saves a copy of the current document each time you save changes to the document. The backup copy has the extension “.bak,” and Canvas saves to this same file each time.
Canvas 8 Help: Customizing Canvas (2 of 24)                                                         Page #222