In iRIC v4 version 4.0.0.6909, released on August 31, 2023, the specifications for zooming in and out operations in the preprocessor window and visualization window were changed.
Before the change, zooming in and out was possible only with the mouse wheel, but after the change, zooming in and out is performed with the mouse wheel while pressing the Ctrl key. This change follows the “mouse hint” displayed in the iRIC.

For more information, please check as:https://dev.to/starfieldkt/iric-v4-changed-the-specifications-of-the-zoom-inout-operation-1noj