A red double circle will appear in the lower left corner of the draft. This is not always displayed and seems to appear when dragging a balloon. This symbol only appears in the unique draft file.
What this double circle symbol means?
Solution
The cause was that "Show alignment lines" in the [Grid Options] command was turned on.
The "Show alignment lines" in [Grid Options] command
In Draft, the default display mode is a red dashed line for the X axis and a magenta dashed line for the Y axis. The user-defined grid origin point is marked by a concentric circle and dot. The default origin is the (0,0) location of the drawing sheet.
Notes
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