Hello all,

i am Luigi from Italy, and a newbie of SU!

I am sorry if i'll put basic questions, but i cannot find out a fast solution to my doubts, and i did not find an effective clarification in any thread!
Let's put i have different blocks (each simulating a furniture piece), i'd like to dispose them close one another, with side of one touching side of other. That is real situation of any shelf, in few words.
I already changed objects to groups.
Let's see image, i want to operate with groups a, b and c, putting a and b close to c, with front side aligned with red axis (as c is):

Troubles start! With Move tool i cannot dispose groups as i'd like, often they move along the axis not aligning in height (blue axis) neither in depth (green). See image with both disalignments:

Sometime also groups "enter" one in each other...
Culd you suggest any procedure to quick learn to have a good control in moving objects, so it will be easier for me to build any form? At moment i just can operate with tens of trials, inputting numbers manually and seeing at result time by time...really frustating!

Thanks a lot, best regards!!!
Luigi