Instant_Preview.lyx: document ps2pdf flag

Starting with TeX Live 2021, the flag -dALLOWPSTRANSPARENCY may be
necessary for the ps2pdf converter.

diff --git a/lib/examples/Graphics_and_Insets/Instant_Preview.lyx b/lib/examples/Graphics_and_Insets/Instant_Preview.lyx
index 29c6db78dfdaf7da7db828e7d9bfb2587f397f2b..4d3b0a8c829e3bd1da0620b066b9cb14b379acd5 100644 (file)
--- 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