After choosing your images, there are various options for stacking. Resolutions include original size, 75%, 50% and 2048px on the long edge often used for social media.
These 3 images are a stack of 290, 10s exposures taken on a GoPro Hero 8.
Full trails
Faded trails
Faded trails with Warp mode on
All image metadata retained (from the earliest taken photo) and exposure time is adjusted to combined exposure of all photos.
Lower half of Orion - Full trails
Lower half of Orion - Shooting stars with Warp mode on