Snap to grid is a feature in the Classic Designer that automatically “snaps” content blocks to a default set of sizes and increments of 25px when those blocks are resized. This makes it easier for you to resize content blocks in your email to fit your needs.
Here is what the snap to grid looks like in action:
Notice in the example above how the blocks are resizing in 25px increments.
Snap to grid is automatically enabled in all campaigns and automation emails that use the drag and drop Classic Designer. However, this feature can be disabled at anytime if you wish to have more freedom with the interface. To disable snap to grid, uncheck the “Snap to grid” box located on the top right of your screen:
Once snap to grid is disabled, the content blocks will no longer adjust in 25px increments: