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subtract from multiple objects


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3 hours ago, schakaa said:

i am trying to subtract the elypse from a bunch of dashes. If i click on subtract i see a blue bar for a long time, but nothing else happens.

The subtract only operates on one layer at a time.  What I believe it's trying to do is to subtract the ellipse from the first line, then the first line from the second, second from the first, etc.  And it hangs.

Plus subtract likes to work on closed curves.  Your dashes are probably open.  To close these select all dashes and do an Expand Stroke.

finally to get around the first issue select all dashes and do a Merge Curves.  Then you will be subtracting the ellipse from the single merged layer and it should work.

If you need the dashes as separate layers you can do a Separate Curves at the end to get this.

iMac (27-inch, Late 2009) with macOS Sierra

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Group lines with Elipse (top layer with Blend mode to Erase). 

Affinity Store: Affinity Suite (ADe, APh, APu) 1.10.5.1342, 2.0.0.
Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 22H2, Build 22621.819.
Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 10 Pro, Version 21H1, Build 19043.2130.
Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130.

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53 minutes ago, schakaa said:

Sorry i do not get it what you mean by merge curves

Assuming you are using Affinity Designer first, select all the dash lines & from the Layer menu select Expand Stroke. Then, also from the Layers menu select Geometry > Merge curves. Do not include the ellipse layer when you do this. 

At this point you should have two items showing in the Layers panel, an "(Ellipse)" layer & a "(Curves)" layer. Make sure the ellipse layer is above the Curves layer & then do the subtraction.

Affinity Photo 1.10.5, Affinity Designer 1.10.5, Affinity Publisher 1.10.5;  2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7
Affinity Photo 
1.10.5.280 & Affinity Designer 1.10.5 for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7

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54 minutes ago, schakaa said:

unfortunately i do not get it.

image.png.175473f58fb2641a562babf053e23a77.png image.png.c4272d845854ca802859aa88a7dc89d9.png

Affinity Store: Affinity Suite (ADe, APh, APu) 1.10.5.1342, 2.0.0.
Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 22H2, Build 22621.819.
Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 10 Pro, Version 21H1, Build 19043.2130.
Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130.

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