Can someone explain this to me??

ok so line the pics up in your folder tht u want to لوڈ اپ side سے طرف کی side, Then, hit the "ctrl"button and at the same time click on ur 1st pic then keep clicking while pressing ctrl, it should look like this so there should be frames around the pics u selected. hope this helps !

When آپ choose the تصاویر آپ must press the shift button to select many تصاویر at the same time
Try it, It works with me :)