We added an opportunity to resize several elements simultaneously in the Flex block. By selecting the group of elements, you can change the size of each one of them. During the batch image editing, the resizing will occur according to the settings you have set. For example, turning the “Scale to fit” switch on in image settings will change size proportionally, and vice versa if the “Scale to fit” switch is turned off. Also, if you hold the Shift button, the resizing will occur proportionally. 

Please note that it is impossible to change the height of the “Text” element while editing batch elements.