Add to docstring

seisman · seisman · commit 3ffb81dd1a1a · 2025-09-21T14:27:15.000+08:00
diff --git a/pygmt/src/grdvolume.py b/pygmt/src/grdvolume.py
@@ -46,6 +46,7 @@ def grdvolume(
     Full GMT docs at :gmt-docs:`grdvolume.html`.
 
     {aliases}
+       - R = region
        - V = verbose
 
     Parameters
diff --git a/pygmt/src/histogram.py b/pygmt/src/histogram.py
@@ -55,6 +55,7 @@ def histogram(
 
     {aliases}
        - J = projection
+       - R = region
        - V = verbose
        - c = panel
        - t = transparency
diff --git a/pygmt/src/solar.py b/pygmt/src/solar.py
@@ -39,6 +39,7 @@ def solar(
 
     {aliases}
        - J = projection
+       - R = region
        - T = terminator, **+d**: terminator_datetime
        - V = verbose
        - c = panel
diff --git a/pygmt/src/triangulate.py b/pygmt/src/triangulate.py
@@ -105,6 +105,7 @@ def regular_grid(
 
         {aliases}
            - J = projection
+           - R = region
            - V = verbose
 
         Parameters
