undo command having no visible effect (sometimes)

Hi, when I use undo (ctrl-z), it usually types _u <command name> and
undoes it. Sometimes it simply prints _u <blank space> and seems to do
nothing at all. I have to do this many many times, maybe hit ctrl-z
10-20 times until it does undo something. I searched this newsgroup
for answers but I only come up with complaints about undo working on
zoom and pan commands - I don't mind that at all. I looked at help
file but it does not mention this issue.. or at least I could not spot
it.

Thanks,

- Andrei

 

Some commands do not produce visible change to the display so "U"
doesn't either.
Some commands can't be undone - like Save.
Do you ever use UNDO in place of U ?The full command name can be
followed by a number to represent the number of steps to go back. U by
itself is equivalent to UNDO 1. The beauty of this is that a REDO
immediately after the UNDO + number takes you back to where you were.
So you could go -
UNDO 50
(not far enough)
UNDO 50
(too far)
REDO
(return by 50 steps)
UNDO 20
(not far enough)
UNDO 10
U
U
U

John B

johnbogie btinternet.com
Put the "at" in the gap.

 

A bit of a long shot (unless I've missed the point here)... tried to see if
RegenMode is turned off?

bruce

 

Hi

You are quite right, ------ and then there are the option with "Mark"
"U" "M" , will produce a mark that the undo will jump to skipping all the Undo
single commands , and stopping Undo at the first Mark it encounter, then at the
next Mark put in the drawing.

P.C.
http://www.designcommunity.com/scrapbook/2573.html

 

I don't use 10-20 of these commands in a row.. Besides, I should see
the name of the command that is being undone after _u, right?

This is a very useful tip - thanks a lot. I'm sure I'll use it much,
but it's not very useful for my problem because I don't know when or
how many of these "blank undo's" will be, so I can't say, okay, there
is gonna be 20 of them now, so I should type undo 20.

At any rate, thanks, to you and all others who answered.

- Andrei