Configuring Post Images
Step 0:
Go to the WordPress dashboard. In the left-hand menu, navigate to Appearance and select Customize. This will open the theme customizer, where various site settings can be modified.
Step 1:
In the customizer menu, click on Theme Option.
Step 2:
Within the Theme Options section, select Post Image. Here, settings related to the display of post images can be adjusted, such as adjusting the image size. After configuring the settings as desired, click Publish to save the changes.