Limit Selection to Visible – Blender Knowledgebase
De)select All – Blender Knowledgebase
Select Linked — Blender Manual
How to Subdivide a Plane, Face, & Cube in Blender - cgian.com
Select Loops — Blender Manual
Select hidden geo without xray display — Right-Click Select
I was using blender then the X-ray feature isn't working it doesn't let me select through objects. I think i may have pressed something someone help : r/ blender