allowResize resource

From The x3270 Wiki
Type Default Option
Boolean true

When true, the x3270 window can be resized by the mouse (actually, by the window manager). When false, the window can only be resized from menu options.

The purpose of disabling mouse resizing is to allow a window bigger than will fit on the screen, which some window managers (e.g., mwm) will not allow if permitted to resize it.