improve docs: clarify report.filter variable and add commandline flags
# Advanced configuration
+## `taskrc` config file options:
+
Other `taskwarrior-tui` configuration options are possible using the user defined attribute feature of `taskwarrior`.
All `taskwarrior-tui` specific configuration options will begin with `uda.taskwarrior-tui.`.
The following is a full list of all the options available and their default values implemented by `taskwarrior-tui` if not defined in your `taskrc` file.
@@ -25,6 +27,13 @@ uda.taskwarrior-tui.style.calendar.title=black on rgb444
uda.taskwarrior-tui.task-report.next.filter=$(task show report.next.filter)
```
+The `uda.taskwarrior-tui.task-report.next.filter` variable defines the default view at program startup. Set this to any preconfigured report (`task reports`), or create your own report in taskwarrior and specify its name here.
+
+## commandline options:
+
+`-c`: specify a config file other than standard `.taskrc`
+`-r`: specify a report to be shown, overrides `uda.taskwarrior-tui.task-report.next.filter` for this instance
+
## Configure user defined shortcuts:
You can configure shortcuts to execute custom commands from your `taskwarrior`'s `taskrc` file (default: `~/.taskrc`).
