Selection Brush Tool not working correctly

[PB1]

I have struck a small problem when working with Photo within a Publisher document, and I have not been able to find a solution.

In Publisher, I imported a jpg photo from my desktop, from which I wanted to remove some of its background and change it to a png, by using the Photo Persona, before incorporating it amongst the text in the publisher document.

The problem is with the Selection Brush Tool.

When I click on it, it appears with 4 white cross hairs surrounding a small circle and when I move it across and click on the photo it produces a Raster Smart Selection with the marching mice. To remove it I have to go to Edit > Remove Raster Smart Selection.

I deleted the whole document and restarted again in a new document using a different photo but I got the same result.

I have opened Affinity Photo on its own, imported a photo, used the Selection Brush Tool and it works perfectly in accord with what it is supposed to do.

I am hoping that someone will be able to offer some advice to correct my problem.

2020-05-08_10-55-45.pdf 2020-05-08_10-56-23.pdf

[carl123]

3 hours ago, PB1 said:

When I click on it, it appears with 4 white cross hairs surrounding a small circle

Your brush size is too small, increase it to something larger

[PB1]

That has not worked. Still the same problem.

Thanks for your suggestion.

[carl123]

Can you upload a full-size screenshot with the tool selected and where you have dragged it across the image to make a selection?

[PB1]

Here is a full size screen shot. I cannot capture the live brush at the same time.

Thanks Peter

 

 

2020-05-12_17-44-29.pdf

[carl123]

At the top-left where it says Width: (currently set to 4px)

Change that to 100px, what do you see then when you drag on the image?

[MEB]

Hi PB1,
Welcome to Affinity Forums
Besides increasing the brush size, you should also tick/enable Snap to edges in the context toolbar for it to easily pick the edges of the subject/person being selected rather than simply "painting" a selection no matter the layer content.

[PB1]

Thank you MEB and carl123. Your answers have fixed my problem. 100px was however too large for what I wanted to do, so I reduced it to 50px and it worked perfectly.
Regards to you both,

Peter