[LyX/master] Instant_Preview.lyx: document ps2pdf flag

[Scott Kostyshak]

commit 70b89e70685f5e584563dde9a5b713b9c3eeb70f
Author: Scott Kostyshak <skostysh at lyx.org>
Date:   Sat May 29 22:21:06 2021 -0400

    Instant_Preview.lyx: document ps2pdf flag
    
    Starting with TeX Live 2021, the flag -dALLOWPSTRANSPARENCY may be
    necessary for the ps2pdf converter.
---
 .../Graphics_and_Insets/Instant_Preview.lyx        |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/lib/examples/Graphics_and_Insets/Instant_Preview.lyx b/lib/examples/Graphics_and_Insets/Instant_Preview.lyx
index 29c6db7..4d3b0a8 100644
--- a/lib/examples/Graphics_and_Insets/Instant_Preview.lyx
+++ b/lib/examples/Graphics_and_Insets/Instant_Preview.lyx
@@ -116,9 +116,18 @@ reference "sec:PSTricks"
 
 , only the Postscript or PDF (ps2pdf) output formats will correctly render
  the included images.
- However, the PDF (Xe\SpecialChar TeX
-) output seems to also work, while trying to typeset
- the document with 
+ Starting with TeX Live 2021, you may need to add the flag 
+\family typewriter
+-dALLOWPSTRANSPARENCY
+\family default
+ to the 
+\family typewriter
+ps2pdf
+\family default
+ converter.
+ The PDF (Xe\SpecialChar TeX
+) output seems to also work, while trying to typeset the document
+ with 
 \family typewriter
 pdflatex
 \family default