Automatic elevation dimension - (+), (-) and (±) sign

[MichalHakel_SP]

Hello,

please could you help me with the following problem ? 

I use dynamic block of elevation dimension (see the attach below). It is based on "Y" coordinate of the drawing and do the automatic elevation dimensioning.

My problem is:

- when the dimension is below/under "0" there is "minus (-)" sign for example "-1,570" - It is OK. However when it is over the "0", "plus (+) sign is missing.

I need:

• - firstly - make a prefix (+) to every number over "0" - like "+1,200" instead of "1,200"

• - secondly - make a prefix (±) to 0,000 elevation - like ""±0,000" instead of "0,000"

Could anyone help me with this please ? 

Thank you very much in advance for your help.

[Libbya · Accepted solution]

I have not found an automatic solution.  What I have done is to add a lookup that has the options of [blank], [+], or [+/-].  You have to actually select the each block instance and set it accordingly and then REGEN to see the change to the field.  You can see that behavior in the block in the attached file.  The lookup pulldown for the symbol is below the line.   

[MichalHakel_SP]

Thank you very much Andrew. As always you have an answer.
I am sorry about that screencast case and your "end" on the forum.