Question

This part is used to raisw or lower the body tube or the stage (depeneding on the type of microscope) to get the right image

Answer 1

coarse Adjustment - moves the boby tube up or down to the correct distance from the specimen for the focussing the object .

Answer 2

Answer:

$\huge\mathcal\colorbox{navy}{{\color{cyan}{\huge\boxed{ \dfrac{ \nwarrow}{ \swarrow} \dfrac{ \nearrow}{ \searrow}}}}}$