Singapored

This works for me on my Mac, the pen tip is a Left Click, while the forward pen button is mimicking the Ctrl & Option keys. (chosen from the pen button's Keyboard > Modifier… submenu).

I've been playing with Affinity Photo for some time now. I really like many aspects of its workflow, and judge them superior to PS's. However, as someone who teaches digital illustration and matte painting, it sadly won't be replacing PS yet. Reasons as follows:
 
1)  I frequently require the flow rate of a brush to be super low. This is especially important for when I clip a layer blend layer to a content layer (e.g. a multiply to locally darken an object). The brush in AP behaves oddly when the flow is set low. By rights, even with such a low flow rate, it should build up to black. However, instead I can only get a dark grey. 
 
2) The preceding point is not a deal breaker: maybe something I could get used to. But the lack of ability to set the flow with a keystroke makes painting difficult. Sure, Opacity can be set with number keys, but for blended painting this isn't enough. The brush is where all the action is, and a brush can be expected to have its values changed several times a minute.  
 
3)  The lack of ability to set the default BG/FG colours to black and white. In PS this is served by the 'D' key. For masking (super vital in matte painting) this is important. Without it, it is too easy to accidentally be using a very dark grey instead of a black, which can really screw things up. 
 
On the plus side:
 
1) The texture options of the brushes are great. I love the fact that many stamps can be loaded into a single brush. This makes the creation of natural textures a lot easier. 
 
2) The Perlin noise is great. Absolutely miles better than PS's poxy little Clouds filter. I love the fact that It scales so nicely. It reminds me of Nuke's noise node. Again, this is great for natural textures. I find myself using photo textures far less. 
 
3)  The Mesh Warp tool is great. Its workflow took a bit of getting used to (it does not automatically act upon selections) but makes sense. 
 
 

Good idea. Perhaps a link on the end of the tool context tool bar for each tool when a preference is set.

A context sensitive help button on the context toolbar is something I could get behind.
 
Active Help could be possible too.
 
Your experience in teaching is clearly helpful in understanding user experience.
 
A very good suggestion, thank you.

I think that in order for Affinity to make significant inroads into education, the help function should receive a significant overhaul. I speak from experience: many years teaching Photoshop in Universities and schools. I also was involved in the development of the help function of a well known app (NDA... sorry no details). 
 
Specifically, I believe that the help for specific tools should be brought much closer to the tool. Good examples in this regard are Maya and Nuke. Both of these place the help function directly in the tool... a link which takes the user directly to the relevant page of the help manual (in a browser). Also worth a mention is MODO's 'Activate Help' feature. By activating this, each menu item turns into a link... to the help page for that item. 
 
 

Fair enough.
 
I agree it would be a nice feature. I can image it being useful in many situations. 
 
I have seen something like it in high end compositing applications, but no where else. But these apps seem to be leading the field in image editing. 
 
Illustrator's Roughen effect does something like it, thought it does not look exactly like a fractal. 

Agreed. It should be discernible from a distance. It is by attention to the large shapes that we can make this happen. These shapes are the positive and negative shapes of the design.
 
Tip: render it in black on white. You will see the shapes easier. Also, flip it horizontally. Artists have been looking at their work in the mirror (the analogue equivalent) for 100s of years. This helps us see the asymmetries of the design. 

same example as jpg
 
 

Hi Asha... there is already a flow slider. But having to constantly tweak it slows down the act of painting tremendously. I know other painters that feel as strongly about being able to control the transparency rate with numbers keys. This is something that AP already has. 
 
In PS the default is that number keys control transparency. When the 'build up' button is activated in brush settings, the number keys then control the flow. 
 
Broadly I would say that Illustrators prefer the transparency setting, whilst matte painters (i.e. photo real) prefer the flow setting. 

This thread has not seen much action, but I think it has huge potential. In the near future, cameras will be able to capture depth as well as RGB (in fact some cameras can already do this, eg Microsoft Kinect and the Lytro).
 
AP could be ahead of the game in being the only editor that could use this info. Imagine being able to color adjust a flat RGB image with reference to its depth channel.
 
Its the future!