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 its 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 youll 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.