Resampling is the term graphics professionals use for scaling an image. An image can be upsampled (scaled up) or downsampled (scaled down).
Sclender supports upscaling via the "Dejag" technology.
Dejag is a high performance filter for upscaling images. Use Dejag when upscaling is wanted but the finer minute details of the image are not likely to be missed (like with 3D).
Dejag HQ is a high quality filter that requires more power than Dejag, but remains faithful to the original image. Dejag HQ is particularly useful when upscaling pixel art.
When upsampling small captures to large size, consider using Dejag HQ first to retain the details, then follow up with Dejag.