Tab autocomplete behavior in tables

Maria Gouskova gouskova at
Mon Nov 30 23:00:00 UTC 2020

On Mon, Nov 30, 2020 at 5:46 PM Paul A. Rubin <parubin73 at> wrote:

> On 11/30/20 5:13 PM, Scott Kostyshak wrote:
> On Mon, Nov 30, 2020 at 04:11:41PM -0500, Maria Gouskova wrote:
> Hi LyX users,
> I'm probably missing something obvious in Preferences, but I couldn't
> figure out how to turn off tab autocompletion for tables. I don't mind it
> in math mode, so it's checked, but I pretty much never ever want that
> behavior in a table. When I hit the Tab key in a table, I want to advance
> to the next cell, and not to see a drop-down menu of random words that
> start with the same string I just typed.
> so, how do I make Tab always advance to the next cell in a table?
> I have similar preferences to you. We just had a similar discussion on lyx-devel:
> You mention that you "don't mind it in math mode". If you also don't
> mind *not* having it in math, then the solution is simple:
> rebind <Tab>. The default binding is the following:
>   "command-alternatives completion-accept;cell-forward;tab-insert;outline-in;depth-increment"
> Just remove the "completion-accept" part in your rebinding.
> If you do want to keep autocompletion for math, then things are more
> complicated. I have a simple patch that does this, but you would have to
> compile LyX with the patch. If you by chance use Ubuntu, I can compile a
> .deb for you, but I can't compile for other platforms.
> Scott
> Scott: Perhaps you can alleviate my confusion here. I use the CUA bind
> file (with a couple of tweaks) and have the same binding for Tab that you
> listed. In the preferences dialog, tab completion is on for math mode and
> off for text mode. In a math inset, if I type something like \right and
> start playing with the tab key, it does various completion tasks. If I'm
> not part way into a LaTeX command (but, say, in an align* environment),
> tabbing moves from cell to cell.
> In a text table, Tab moves from cell to cell, period. I do *not* under any
> circumstances get prompted to do word completion. (If it matters, I do have
> continuous spell checking on, using Enchant.) So I can't reproduce the
> problem. While I'm not complaining, either I don't understand the problem
> or you and Maria both failed to appease some digital deity with whom I am
> apparently on good terms.
> This is on Linux Mint 20, so behavior should be the same as on Ubuntu
> Focal.
> Paul

Paul, I also have cua on Linux Mint. The rest of my LyX is minimally
customized, so whatever is on by default is what I usually have.
One good way to set this off is to have words in the text around the table
that start with the same substring. Try this for a minimal example:

"notion, notation, noble, nonsectarian, nondeterministic"

then in table: enter "no" in a cell, and hit Tab. (If you hit "yes", it
should move you to the next tab, which iis what we want.") After "no",
though, I see "nominal" in my minimal example, as well as some of the words
from the list I entered above.

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