add parameter docs

app.py

@@ -379,6 +379,19 @@ def build_demo():
                     interactive=False
                 )
         
+        gr.Markdown(
+            """
+                Parameters:
+                - `process length`: only process the first `process length` frames for geometry estimation, `-1` denotes the whole video
+                - `max resolution`: downsample the long side to the target resolution (if exceed) before processing to save memory usage
+                - `num denoising steps`: the number of denoising iterations, `5` is enough for most cases
+                - `cfg scale`: recommended as the default value `1.0`
+                - `shift window size`: recommended as the default value `110`
+                - `decode chunk size`: chunk size for VAE decoder, you can set it as `4` or `6` to save memory usage 
+                - `overlap`: recommended as the default value `25`
+            """
+        )
+
         gr.Examples(
             examples=examples,
             fn=infer_geometry,