How to erase stitches and whole rows in a crochet chart
The Eraser clears one stitch, or a whole row or column, in one sweep.
Steps
Choose the Eraser (or press E on the keyboard) on the left toolbar.
Click a cell to erase the stitch in it.
To clear a row, press at one end of the row and drag along it to the other end.
To clear a column, press at the top or bottom of the column and drag along it.
Try it here
Good to know
Rows and columns
The Eraser works along rows and along columns. The direction you drag first decides which, and it stays on that line until you let go.