update README.md to explain attach-on-launch and -h
diff --git a/README.md b/README.md
index 120f75e..e899cf8 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,16 @@
## Attaching to an action
-Say for example you wish to attach to an action `foo`, and this action occurs in a sequence `seq`.
+You can attach to an attach on startup by passing the action name to the initial invocation. Say for example you wish to attach to an action `foo`, and this action occurs in a sequence `seq`:
+
+```
+% ./wskdb foo
+Attaching to foo
+ Creating action trampoline
+ Creating sequence splice seq
+```
+
+You may also choose to launch the debugger and attach to `foo` later:
```
(wskdb) attach foo
@@ -41,6 +50,20 @@
Creating action trampoline
```
+### Getting Help
+
+The short-hand for this is `-a`. To learn more about the options for each command, you can issue a `-h` request, e.g.
+```
+(wskdb) attach -h
+Usage: attach [options]
+
+ --help, -h
+ Displays help information about this script
+
+ --action-only, -a
+ Instrument just the action, not any rules or sequences in which it takes part
+```
+
## Choosing CLI versus Browser-based Debugging
By default, `wskdb` will prefer to use a browser-based debugger. If instead you wish to use a command-line debugger, pass the `--use-cli-debugger` option to `wskdb`; the short-hand form of this option is `-c`:
