Dimension

[jbohaj]

We are Novices. A window is drawn on a Circular wall and we moved its copy @ 5' distance. But the measured distance with Tape Measure between both windows is 5' - 1 1/4". Why the distance differ with each other as we moved window @ 5' distance. Also which Dimension is ideal to measure precise distance, when the windows are drawn on a circular walls. We tried Aligned Dimension but it Snaps only one Mid point of window and mid point Snap is not appearing on 2nd window.

[Dimitri Harvalias]

Welcome to the forums.
If you copy the window horizontally then it won't be placed exactly the same distance because you are placing it in a curved wall. Revit will need to move it slightly to make sure it stays hosted by the wall.
You can use the arc length dimension to place them more precisely. Select the arc length dimension type. The first pick will be the face of the curved wall, then you can pick each window at the correct reference point. Once the dimensions are in place you can select the windows and the dimensions will be editable.

[kathy71046]

Here is the screenshot I couldn't PM you with.