What does "undraw" mean?

To draw aside or open; to pull back a layer of fabric, e.g. a curtain.

Undraw

verb

verb ·Rare ·Advanced level

Verb

1
To draw aside or open; to pull back a layer of fabric, e.g. a curtain. transitive
"She undrew the curtain to reveal the shining rays of the sun."
2
To clear or erase part of a drawing. transitive
"It is easy to highlight graphics on a monochrome system. The simplest way is to set the GC to the GXxor logical function and draw your graphics once to draw them and again to undraw them."

"Will you undraw the curtains, please?"

From un- + draw.