Here’s a quick, flexible and powerful way to add colours to your shadows and highlights. The basic principle shown here is to use a separate gradient map for each of shadows and highlights and to use a contrast blend mode, most notably Linear Light.
Extra note: You can use this method to add colour to other tonal ranges, such as mid-tones where much of the average image will be.
For related videos, see here: http://changingminds.org/disciplines/photography/affinity_photo/youtube_videos/770_flexible_tinting_shadows_highlights.htm#see
There are now online pages for InAffinity here: https://changingminds.org/disciplines/photography/affinity_photo/affinity_photo.htm
Free resources, including macros, palettes, etc. are here:
If you are a beginner, start here:
There is a full, cross-referenced index for every video here: https://changingminds.org/disciplines/photography/affinity_photo/inaffinity_video_index.htm
To find videos by date of publication, start here: https://changingminds.org/disciplines/photography/affinity_photo/ap_time-sorted.htm
To find videos by subject, start here: https://changingminds.org/disciplines/photography/affinity_photo/categories/ap_categories_alphabetic.htm
The web page for this video is here: http://changingminds.org/disciplines/photography/affinity_photo/youtube_videos/770_flexible_tinting_shadows_highlights.htm