I think adding zoom level will be useful to know the current state of zooming while drawing. The zoom level can be percentage for example or number of zooming steps ( +/- number) . Also the ability to reset the zoom level by clicking the zoom level is essential as the user maybe changes the zoom level a lot and it should be there an easy way to get back to the base zoom level instead of clicking zoom in or out multiple times.
I think adding zoom level will be useful to know the current state of zooming while drawing. The zoom level can be percentage for example or number of zooming steps ( +/- number) . Also the ability to reset the zoom level by clicking the zoom level is essential as the user maybe changes the zoom level a lot and it should be there an easy way to get back to the base zoom level instead of clicking zoom in or out multiple times.