[exported JPG turns black (Af Photo)]

JPEG files don't support transparency, that I presume was in the original file. Export your file to PNG or TIFF and it displays correctly. Or change the colour format to RGB then you can save as a JPEG, but will  lose the transparency.

[Cutout tool blends border with background]

Not sure of your problem. But try - make a selection, click refine on the context toolbar. Then in the dialogue box untick matte edges.

[Kazuko]

Superb!

[My first impressions with Affinity]

Well done.

[From picture frame to path]

Worked for me. Make sure the frame is selected and the picture frame tool or move tool are selected, otherwise convert to curves is greyed out.

[Drag opposite handles of a node simultaneously]

You're welcome.

[Drag opposite handles of a node simultaneously]

click left + right mouse/trackpad buttons to move both handles.

[Default colour management]

When you choose CMYK on the sliders panel, click on the lock icon to lock colour space.

[Default colour management]

Click on colour tab in studio, then click on the hamburger icon on the far right and choose sliders. Then from the sliders menu you can choose CMYK.

[Slanted line]

I also think it may be an optical illusion. Is the eye trying to make the angled lines of the triangle and number nine as being parallel, thus causing the illusion?

[My affinity account is locked]

Hi VanessaLin, on the sign-in page click on the "Forgot password?" and follow Instructions.

[[New 1.2] Free Vector Tools for Windows 10 Users]

Thanks GarryP. A super easy to use and useful tool, especially for those (like me) who are newcomers to the world of vector graphics.

[Purchase without credit card]

You can also purchase Microsoft gift cards, and once redeemed into your store account, can then be used to purchase Affinity software - and anything else in the store.