My first Zbrush project

[pmdesign]

Hi all , I am new to 3d modeling - here is my first attempt. still needs a lot of work ( But Fun) - I am having issues with layers - once I create a new layer and return to my previous I can not edit it or move it , and how can I group layers together without merging them - What am I doing wrong ? or am I thinking to much of photoshop. I will be sure to have more stupid questions soon for all you pros .

Thanks for your help

PM