And Or and Not control whether your next selection is added to or removed from the entities you have already selected.
Or (the default) means that when you are selecting entities, any new selection is added to the current selection.
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And Or and Not control whether your next selection is added to or removed from the entities you have already selected. Or (the default) means that when you are selecting entities, any new selection is added to the current selection. |
For example, if you choose Erase,Layer, COAST/SEA, Layer, STRUCTURES, both the COAST/SEA layer and the STRUCTURES layer would be selected. This is the default (Or) If entities are on the STRUCTURES layer Or on the COAST/SEA layer they are selected.
There are two other options you can set here, And and Not. These remove entities from the current selection.
And
Restricts the selection. Choose And, now you can add another set of selection criteria, telling CC3 to perform the editing operation only on entities that pass both the first test and the second test. For example, you could select Layer "STRUCTURES", then And, then by Type: 2D Line to edit only lines on the "STRUCTURES" layer.
Or
Adds to the selection. It is the default. When you choose Or, you can add another set of selection criteria, telling CC3 to perform the editing operation on entities that pass either the first test or the second test. For example, you could select some entities using the pick box, then select Color blue to add all the blue entities in the drawing to the first selection.
Not
Restricts the selection. When you choose Not, you can perform an editing operation on all entities that pass the second test. For example, you could select by All, then Not, then use a pick window to edit all entities outside of a window.
Overview
After you select entities by one of the methods in the "Select entities by:" dialog box, you can right click then select Do it to go ahead with the command--or choose And, Or, or Not to modify the selection.
For example, you might need to erase everything within a selection rectangle (window) except for a certain line. You might need to rotate all green text entities on the STRUCTURES layer, but not green text on other layers. You might want to move symbols from the VEGETATION, and lWATER/RIVERS layers to the GAME MASTER ONLY layer, or to erase everything that’s outside a selection window. In most cases, you could accomplish these tasks by selecting entities one by one or by repeating the editing command--the logical operators just make your work quicker and easier.
This is how the selection process works from CC3's point of view: When you use the entity selection dialog box, you are asking CC3 to select entities that pass a test. For example, when you select by WINDOW, CC3 searches your drawing, testing each entity to see whether it falls within the selection rectangle. Logical operators tell CC3 to apply two (or more) tests and compare the results. If you use And, entities must pass all the tests to be included in the selection. If you use Or, entities only need to pass one of the tests. If you use Not, only entities that do not pass the test are included.