Google sheets filtering

First you select the area to filter, must include all the data and start with the titles you want the filter to be applied to e.g. if i just want filters from requirements column to specification column. 

Then Click on the little green arrow then create a filter view, as you can see i've created various filters already. These can be saved and renamed and deleted in the next screen. 

Then it will open up a sub window surrounded in black and your filters would have been applied. Click on the red arrow to rename and blue arrow if you want to delete etc the filter and you can close this window and revert back to the original view by clicking the x in the black bar top right corner.