diff --git a/README.md b/README.md
index ef94e78..b8fa221 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,19 @@ $ ./rntviewer ntpl lmext1.root
 ```
 
 ### Usage
+Basic usage is:
 ```
 $ ./rntviewer <ntuple_name> <ntuple_file.root>
 ```
+
+This will open a window and let you browse the RNTuple, jump around its sections and get some
+information about them.
+
+There is also a non-interactive non-graphical mode that can be used in a terminal (useful
+e.g. for ssh sessions):
+```
+$ ./rntviewer -t <ntuple_name> <ntuple_file.root>
+```
+
+The `-t` flag enables terminal mode. Use `./rntviewer -h` to get a help message about the
+other flags that rntviewer accepts and are particularly useful in non-interactive mode.