Math Equations Instant Preview Does not Work

[Baris Erkus]

On 7/10/2026 9:20 AM, Baris Erkus via lyx-users wrote:
> LyX does not "instant preview"  the math equations anymore. It did, 
> before. I do not know what I did that caused this behavior. I think, 
> LyX 2.5.1 was able to instant preview the equations, but not sure.
>
> When I enter into an equation editing box, and go out momentarily, the 
> instant preview works on that specific equation. When I exit LyX and 
> reopen, the same cycle repeats.
>
> I am betting that this is related to either updated permissions of 
> Windows 11, updated TexLive, some issues with the LyX cache or smtg 
> similar.
>
> I will see if I can fix it by myself, but I want to know if anybody 
> else experience a similar issue, and what would be suggested checklist 
> of actions on this?
>
> Baris
>

Answering my own question:

Seems like if an equation is put into an landscape environment along 
with some other formatting command, that specific equation locks the 
instant preview of the whole document:

\begin{landscape} \vspace*{\fill} \resizebox{\linewidth}{!}{

$\setcellgapes{9pt}\makegapedcells\ensuremath{

\global\long\def\arraystretch{2.2}%

\begin{array}{cc}

a & d\\

c & b

\end{array}}$


}\vspace*{\fill} \end{landscape}

See the attached MWE.

Baris

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