As you work on a drawing, visual elements may remain after the completion of a command.You can remove these elements by refreshing, or redrawing, the display.
To redraw (refresh) the current window display
Choose View > Redraw.
Command line REDRAW
Information about drawing entities is stored in a database as floating point values, ensuring a high level of precision. Sometimes a drawing must be recalculated, or regenerated, from the floating point database to convert those values to the appropriate screen coordinates. This occurs automatically. You can also manually initiate a regeneration. When the drawing is regenerated, it is also redrawn.
To regenerate the current window, type regen in the command line. If more than one window is displayed, type regenall to regenerate all the windows.
REDRAW: Refreshes the display in the current viewport and removes the marker blips from the current viewport
REDRAWALL: Refreshes the displays in all viewport and removes the marker blips from all viewports.
REGEN: Regenerates the current view and recomputes the screen coordinate for all entities in the current viewport
REGENALL: Regenerates the current view and recomputes the screen coordinate for all entities in all viewports
System Variables Reference