To erase something like a bitmap call delete on the item. Assuming your Canvas tag is $canvar and your item tag it $bittag (as in the previous [10.1] question) then the call proceeds like:
$canvar -> delete($bittag);This is of course useful in a callback. For example to configure a Button to do your deletion for you you could say something like:
$main->Button(-text => 'clear', -command=>sub{$canvar -> delete($bittag)} )->pack;
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