doc updates

doc/xschem_man/developer_info.html

@@ -465,6 +465,15 @@ C {verilog_timescale.sym} 1050 -100 0 0 {name=s1 timestep="1ns" precision="1ns"
  <img src="developer_info_06.png"><br>
  <br>
  <h1>XSCHEM COMMANDS REFERENCE DOCUMENTATION</h1><br>
+ <p>
+   The following are xschem specific tcl commands.
+   All commands are prefixed by the <kbd>xschem</kbd> keyword.
+   <br>
+   Example:
+ </p>
+ <pre class="code">
+     <strong>xschem</strong> getprop instance x3 OFFSET </pre>
+ <br>
  <ul> <!-- Following list items generated in xschem src dir with: 
              ./extract_scheduler_cmd_help.awk scheduler.c > ~/xxx 
            Include ~/xxx here.