add message modifier info to README

1 files changed, 10 insertions, 0 deletions

diff --git a/README.md b/README.md
index e6fe5a6..47973f5 100644
--- a/README.md
+++ b/README.md
@@ -141,6 +141,16 @@ Set yourself away/back:
 /slack back
 ```
 
+Modify previous message *Note: this is not regex, just similar syntax*:
+```
+s/old text/new text/
+```
+
+Delete previous message:
+```
+s///
+```
+
 Turn off colorized nicks:
 ```
 /set plugins.var.python.slack_extension.colorize_nicks 0