mouse selection

Continuing with last week’s theme of efficient use of your mouse, this week I’ll show the three ways to select things with the mouse.

There are three ways to select objects on your drawing:  single selection, line selection and rectangular selection.

Single Selection

This is the obvious one that everyone knows:  click on an object to select it. 

Note, though, that in some modes you also have to pick what type of object you’re going to select.  In Draw Materials, for example, you first pick from the dialog box whether you want to assign the material to regions or to lines.

Draw Materials

Line Selection

Line selection is probably the least obvious one, but it can be very helpful.  Hold down the Shift key and click once.  Continue holding the Shift key and you’ll see a dashed line following your mouse around.  Click a second time to complete the selection.  Everything on the line between the two clicks will be selected.

Line selection (also referred to as “shift-selection”) is especially useful for selecting points or lines along an angled surface.  For example, drawing boundary conditions on a slope.  (This was even more useful in v6 and older versions where you were applying BCs to the nodes, without the luxury of being able to simply click on a the line.)

Using line selection to apply a boundary condition

Rectangular Selection

Rectangular selection is another common one most of you will be familiar with.  Drag a rectangle (click the left mouse button and move the mouse without releasing the button) around the objects you want to select.  Any object that is completely contained by the rectangle will be selected.

It’s mostly because of rectangular selection that some modes (like Draw Materials) force you to choose what you want to select.  Since materials can be applied to regions or to lines, if you dragged a rectangle around a couple of regions we need to know whether your intent is to apply the material to those couple of regions or to all the lines.

All of the Draw modes support these three basic selection types, as does Modify Objects.  Even some of the KeyIn dialogs support graphical selection–try KeyIn Materials, for example, and click on a region in your drawing.  Draw Graph supports even more advanced selection, but that will be a topic for some other time.

Do you have any tricks you’ve learned that help you make the most of GeoStudio?  Leave a comment so we can all benefit!

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