1. Choose the "..." option to "Expand Toolbar"

2. Choose "</>" option to "Insert/Edit code sample"

3. a) Choose "q (kdb+ database)" in the "Language" dropdown
3. b) Enter the code you wish to display
3. c) Hit "Ok"

Your message will now contain a code block
q)tab:([] a:1 2;b:4 5)
q)tab
a b
---
1 4
2 5
q)select a from tab // A qsql query
a
-
1
2
Tip: To edit your code block double click on it