How to expand an object I have an .stl file of a fan cover. I need to expand it, or stretch it, from the front and pull it out about three times it's depth. I've looked at Youtube videos on extruding and stretching but I can't get it to move in the right direction.
Thank you for any help.
Here is the .stl file: https://www.dropbox.com/s/lqkf2dkcinmrgax/hotend_fan_shroud_cover_remix.stl?dl=0
Go in Edit mode (tab), choose the left view (3), and switch to X Ray (AltZ) to be able to select through:

Choose the Lasso Select tool (or use the shortcut):

Select the part of your mesh you want, press shift to select again:

Switch to the Move tool (or shortcut G):

Move the selection, use the gizmo to move on the Y axis or press Y to contrain on this axis: