sketcher
/ˈsketʃər/Definitions
1. noun
A person who makes or draws sketches, especially a person who makes preliminary drawings for a work of art or an architect.
“She was a skilled sketcher who worked for the architectural firm.”
2. verb
To make or draw a sketch of (something), especially for a preliminary study or to convey a general impression.
“The artist began to sketcher the outline of the building on the canvas.”