hello, everyone
recently, I have drawn a simple figure with ascii art using textdraw.
(sudo apt-get install textdraw; and then run textdraw in a terminal)

for example, I have drawn such a figure:
end point________________ _________ _________ __________ ____________
| | | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
|____b0_____|__b1______|__b2_____|__b3_____|__b4__ ____|_____________
start point

the only problem left for me is how to remove(or erase) a object I have
drawn.
Pressing h will tell us:
d delete delete marked object
m move move marked object
...(a few lines omiited)
position cursor with cursor keys
mark object at 'hot spot' (<=== the actual meaning?)
to load existing file: <td filename>
try also: home, end, pgdn, pgup

The keypoint is that I could not understand this line:
mark object at 'hot spot'





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