Xoops 2.3 comes with automatic image resizing : the image becomes clickable and opens in a new window at full size. Sometimes you need to fine tune this effect, or simply to deactivate.

Simply go to /class/textsanitizer/image/config.php ,and set the proper values for :

// Click to open an image in a new window
'clickable' => 1,
// Resize the image
'resize' => 1,
// Maximum width of an image displayed on page, otherwise it will be resized
'max_width' => 300,