Unit system/blocks/dimension

Hi,

1. I have tried to change the unit system in CCS manager but it can't be changed.I change the unit system then click 'apply' then click 'OK'. By doing this my unit system doesn't change.Please help me with this.

2. Is it possible to edit the blocks?

3. while stretching the line,how would i put the exact measurement? OR putting the co-ordinates is the only way?

Thank you,

Sumit kumar