Isaacsong23

Hi guys!!i am currently using cura 2.6.1 and am currently using creality ender 2, so far i have been printing very well with the reccomended settings on fine, however i really want to include a glass bed or sort as my current one is not really ideal. The printer that i have has auto home settings and the value is fixed however, am i able to change the Z-value in Cura 2.6.1 maybe adjusting the G-code? I need help in this area!!Thank you!!