Issue 60591 - Labeled arrows is missing
Summary: Labeled arrows is missing
Alias: None
Product: Math
Classification: Application
Component: code (show other issues)
Version: OOo 2.0.1
Hardware: All All
: P4 Trivial with 4 votes (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
QA Contact:
Keywords: oooqa
Depends on:
Reported: 2006-01-15 20:09 UTC by zirneklitis
Modified: 2013-02-07 22:42 UTC (History)
4 users (show)

See Also:
Latest Confirmation in: ---
Developer Difficulty: ---

Example of formula with labeled arrow (441 bytes, image/png)
2006-01-15 20:10 UTC, zirneklitis
no flags Details
Desired labeled arrows (230 bytes, image/png)
2006-01-15 20:11 UTC, zirneklitis
no flags Details

Note You need to log in before you can comment on or make changes to this issue.
Description zirneklitis 2006-01-15 20:09:31 UTC
There is no possibility to create labeled arrows in Math. In some formulas it's
more then welcome feature. See example "labeled_arrow.png". The desired
placement of labels and arrows can be seen in example "labeled_arrows.png"
Comment 1 zirneklitis 2006-01-15 20:10:53 UTC
Created attachment 33240 [details]
Example of formula with labeled arrow
Comment 2 zirneklitis 2006-01-15 20:11:27 UTC
Created attachment 33241 [details]
Desired labeled arrows
Comment 3 lars 2006-01-15 22:25:05 UTC
according to
RFE_issues_by_QA.sxd I reassign this issue to requirements and set the status 
to New
Comment 4 discoleo 2007-08-12 17:11:52 UTC
Labeled arrows are indeed extensively used in chemistry.

I will add here some signs often used in *chemistry*:

 1. Equilibrium:
    (aka double half arrows for chemical equilibrium)

    simple: dual arrowheads: A <----> B

    Start -------------  Product
          \     k2

    where k1, k2 are the equilibrium constants (are omitted sometimes)

 2. Reaction progression:
    one of the reaction less likely / unlikely

    Start      --------  Product
               \   k2

    especially k2 is omitted

 See e.g. on wikipedia:
 (although the notations there are very basic, yet more than OOo can do)

 For another image with equilibrium constants, see: and

 This one uses --> arrows, but half arrows (---`) are also common
 and sometimes preferred.

 3. Broken arrows:
    (I did NOT find them)

    ---X--->, ---//--->, ---/---> and the double arrow versions

Well, TEX has a wide range of useful additions that are currently lacking in OOo.

Just to extend the arrows-issue in chemistry, I append some TEX-elements
   Table 132: chemarrow Extensible Accents
   These symbols are all “reverse accents†in that the two arguments serve,
   respectively, as a superscript and a subscript to the arrows.
   In addition to the symbols shown above, chemarrow also provides
      \leftrightharpoonsfill, and
      \rightleftharpoonsfill macros.

For an extended list of TEX-symbols, see

I already added these comments to issue 80616, although that issue should
probably handle different things.
Comment 5 lapsap7+ooo 2011-06-13 13:54:57 UTC
To annotate arrows, you could use csup and csub.  At least, in OOO 3.3 Math, this is possible.

Example: rightarrow csup{abc}

However, the current problem is that the arrow is not elongated to adjust itself to the width of center superscript or subscript contents.

There are two (ugly) workarounds:
1. Construct your own (broken) arrow from Unicode characters:
   ― U+2015 for horizontal line
   → U+2192 for right arrow
    X "―→" csup{abc} csub{ijk} Y
   use as many horizontal line chars as necessary!

2. Go to Wikipedia's sandbox (, edit the page, type in
<math> \xrightarrow{abc} </math>
and show the preview. Wikipedia will then generate a temporary png image for the math formula that you could save and use in the document :-/
But you'd better save the Wiki math expression somewhere if you want to "modify" it later and you don't have to type everywhere from zero.
Comment 6 lapsap7+ooo 2011-06-13 13:58:30 UTC
For other possibilities in Wikipedia, the URL is