How to set off previous years' losses against current year's gains partially?

Hi, I am using ITR2 for my returns of FY 2016-17. In this year, I have LTCG (20% tax) of some Rs. 1,62,000. My previous years' carried forward losses are Rs 1,54,000. I want to set off these 2 using sheets CFL and BFLA. However, I want to utilize only Rs. 10,000 of previous losses for this year and carry forward the rest Rs. 1,44,000 losses for future years. But when I enter my previous years' losses in CFL sheet, the total of these are taken in BFLA sheet for set off. Is it this way mandatory to utilize all capital losses in a single year? Any via media to utilize part of losses this year and carry forward remaining for future? Thanks in advance. Makarand