Add hint about the need of Acrobat DC

lib/examples/Modules/PDF_Form.lyx

@@ -1,5 +1,5 @@
 #LyX 2.4 created this file. For more info see https://www.lyx.org/
-\lyxformat 600
+\lyxformat 608
 \begin_document
 \begin_header
 \save_transient_properties true
@@ -81,9 +81,9 @@ pdfform
 \font_default_family default
 \use_non_tex_fonts false
 \font_sc false
+\font_roman_osf false
 \font_sans_osf false
 \font_typewriter_osf false
-\font_roman_osf false
 \font_sf_scale 100 100
 \font_tt_scale 100 100
 \use_microtype false
@@ -132,8 +132,8 @@ pdfform
 \justification true
 \use_refstyle 0
 \use_minted 0
-\notefontcolor #0000ff
 \use_lineno 0
+\notefontcolor #0000ff
 \index Index
 \shortcut idx
 \color #008000
@@ -149,12 +149,16 @@ pdfform
 \papercolumns 1
 \papersides 1
 \paperpagestyle default
+\tablestyle default
 \tracking_changes false
-\postpone_fragile_content false
 \output_changes false
+\change_bars false
+\postpone_fragile_content false
 \html_math_output 0
 \html_css_as_file 0
 \html_be_strict false
+\docbook_table_output 0
+\docbook_mathml_prefix 1
 \end_header
 
 \begin_body
@@ -183,7 +187,7 @@ Uwe Stöhr
 
 \begin_layout Standard
 \begin_inset Note Note
-status open
+status collapsed
 
 \begin_layout Plain Layout
 To export all parts of this document to PDF the \SpecialChar LaTeX
@@ -194,6 +198,21 @@ insdljs
  must be installed.
  If it is not installed you can export the document anyway but the example
  in the section about dynamic form elements will not appear in the output.
+
+\series bold
+ insdljs.sty 
+\series default
+is part of the 
+\series bold
+acrotex
+\series default
+ bundle available on CTAN.
+ As the name suggests, the style files of the bundle produce pdf files which
+ will work correctly 
+\emph on
+only
+\emph default
+ with Acrobat DC.
 \end_layout
 
 \end_inset