User manual update (update 1 of 3)

Text has been added for the undo facility and for the specification
of atmospheric pressure.

Two images added.

Signed-off-by: willemferguson <willemferguson@zoology.up.ac.za>
This commit is contained in:
willemferguson 2019-06-25 20:52:52 +02:00 committed by Dirk Hohndel
parent 0b5eba031b
commit 230f3846fa
3 changed files with 42 additions and 7 deletions

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