Slitherine

How can you raise and lower a bunch of tiles quickly, or do I just have do it by hand?

raise ; ctrl + left click on tile
and lower; ctrl + right click on tile

let me clarify, is there a way were I could change the height of area all at once. Here's a example, I am making a mountain, and need to lower the base height by three, and then increase the grid till it reaches a height of six tiles. In doing so, is there a way to select the tiles I need and then raise them at the same time so I am not just raising/lowering terrain then entire time

Sorry, no way.