METHOD 2, RTSS (WORKS WITH DXGI CAPTURE API ONLY AND DOES NOT REQUIRE LS OVERLAY TO WORK)
Before making any changes install Montserrat font #1329699315467419658 message, then on the RTSS interface to On Screen Display Rendering Mode and click on Raster 3D. Change font to Montserrat- Extra Bold- Size 7 (for all profiles separately if needed)
Step 1) Download autohotkey from the link provided, https://www.autohotkey.com/ Install the latest version. It is required to open ahk script.
Step 2) Download and copy files(ovl and png file of overlay you want) to C:\Program Files (x86)\RivaTuner Statistics Server\Plugins\Client\Overlays. Overwrite if you have presentmon_custom.ovl.
Step 3) Enable and open overlay editor, click Layouts and Load. Select your downloaded presentmon_custom.ovl from the list. Then Layouts and Save.
Step 4) Open task manager and go to details. Find PID number for your lossless scaling exe and remember it.
Step 5) Open overlay editor, Layouts and Edit. Environmental Variables, type PM_ProcessId=3302 (example, write your exact PID number instead of 3302). Layouts and Save.
Step 6) Download Attach-Lossless Scaling.ahk. You will need this ahk to switch your PID number automatically. PID is required to capture LSFG fps, if you dont use this script your frame generation fps won't be shown on the overlay. You need to set your PID correctly once before this script to work properly. After first time when you open ahk file, it will switch your PID number automatically for lossless scaling. Each time you close lossless scaling (including restarting pc etc.) your PID number changes. Then double click ahk and switch to right number. Keep lossless scaling in tray to not close it accidentally and use hotkey to scale for games if possible. Attach-Lossless Scaling.ahk script is written by @gentle tusk