@jean lemire said:
Hi Paul, hi folks.
Read SU help about the Dimension Tool.
The Dimension Tool can auto select lines, arcs, circles and Freehand lines when the cursor is placed over one of these objects and will produce the dimension accordingly as per the following list:
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for a line, its length;
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for an arc, its diameter (by default, this can be changed to radius);
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for a circle, the same as for an arc;
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for a Freehand line, the length of the segment you are clicking on.
Of course, for this to work, you must be inside the context of the object to dimension. If the object is inside a group or a component, you must first access the inside of the group or component.
For a line or a polygon, you must click on one end of the line or one end of one side of the polygon and then click at the opposite end of the line or the opposite end of the side of the polygon.
You can also dimension from a circle or arc or polygon center. You can dimension from a line midpoint.
If you want to use two clicks to dimension any distance between two points from which you can obtain an inference, you do not need to be in the same context.
You may use one or two temporary lines to get clikable points to start and/or end a dimension. After placing the dimension, you delete the line. This trick allows you to place the distance between to parallel faces, for example, or form the middle of a face to a point.
I suggest that, after reading the help and seeing the video tutorials, you practice with all kind of dimensionning, including these tricks to get the feel of this tool. Play with the settings to position the dimension text, to orient it and to edit it. Many funny possibilities await you.
Take a look the three SU files joined to this post for ideas.
Thank you for your help, I found it. Thank you also for the files I downloaded