9.4 - Preferences Dialog
Preferences is where you set some of the application's general behavior.
9.4.1 - Antialiasing
Each of the area tools has its own antialiasing switch (checkbox.) All share a common range, which is a value specified in pixels that the antialias effect will extend inside and outside the area selection boundary.
So if you set range to 2, the antialiasing effect will extend 2 pixels into the selection from its edge, and 2 pixels outside the edge of the selection as well.
Keep this in mind — it affects how you might plan some area selections.
9.4.2 - Grid
This is the pixel grid. You can change it "hot" in any action image with g and G (shift+g).
9.4.3 - Meta Defaults
This is how you set the iToolBox defaults for the Annotation, Author, and Copyright operators. In addition, you can set a GPS home location for the GPS operator to use.
9.4.4 - Wand Tolerance
This specifies how "different" a pixel's color must be from its neighboring pixels before the wand will select it. A small number means that the pixel has to be quite different. A large number means that a large difference is acceptable. This setting often varies with the task at hand; you can keep the preferences window open and adjust it at any time.
9.4.5 - Confirmation
These two settings allow you to control iToolBox nagging you about forgetting you have unfinished work. For myself, I never turn this off, but some people will not want to be nagged.
9.4.6 - Miscellaneous
✓ Compact Help eliminates most of the blank lines in the Help dialog.
✓ Assign crop as Origin Causes a crop to immediately become the origin image, ready for a merge operation.
✓ Restore Window Positions Causes iToolBox to put windows back where you left them. WIth regard to image views, the first one will be left where the first one you loaded was when you last closed the application, unless this is not checked. You can leave it checked, and with ✓ Position Freeze on, the window position will not update even if you move the first window you opened. If, with ✓ Position Freeze checked, you Set, then the current position of the first-loaded window will be saved. It's a little complicated, but once you get your head wrapped around it, it makes the application much more pleasant to use.
Note: Windows after the first window will open cascading down and right.
✓ Use Native File Dialog iToolBox offers a custom File dialog that allows you to filter the filelist and is generally much faster than the osx native file dialog. However, if you find you prefer the native file dialog, just check this.
✓ Use Native Color Dialog iToolBox offers a custom color dialog that allows you to select more colors and is generally much faster than the osx native color dialog. However, if you find you prefer the native color dialog, just check this.
✓ Rects always use guides is a convenience for your area selections.
✓ Ovals always use guides is a convenience for your area selections.
9.4.7 - Alpha Treatment
✓ Off-image Checking allows you to display an alpha checked pattern wherever the image boundaries are exceeded in an image view.
✓ Alpha Checking allows you to display an alpha checked pattern wherever the image is transparent, underneath the transparency.
✓ Mask with target Alpha affects compose operations such as (Unknown Built-in or Squiggly: tag=" a opmerge.html,merge" data="checked Mask with target Alpha") . With ✓ mask with Target Alpha checked, if you compose over an area of an image that is transparent, the image's transparency will control how much of the compose operation occurs.
With ✓ Mask with Target Alpha unchecked, the compose operation will create new opacity (set its own transparency levels) when it occurs.
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