big smile

Hi Big Smile,
There is no shortcut for selecting the entire contents of one page in a 2 page spread I'm afraid.
Thanks
C

Go to File/Document Setup and check 'Facing pages'.

Assuming your document already is formatted with facing pages, you can double-click on any page in the Pages panel to jump the view to that page. If instead you double-click along the centerline of the spread, the view jumps to the 2 page spread.

1) Selecting behind objects
You can use the OPT key (instead CMD) to click through various layers with the black arrow cursor (move tool). Or directly select the wanted object in the Layers Panel.
2) Fit frame to text
When you hover over a frame's node the cursor changes to a double arrow. Then a double-click on a mid node sets the frames size to fit its content in the arrow's direction, either horizontally or vertically. With CMD-double-click you make it size from the frame's midpoint.
3) Paste in place
AfPublisher always pastes in place, there is no need to select or activate that behavior.
If the copied object comes from a facing page spread then it gets placed on another spread at its initial coordinates – whereas it gets placed on a single page in the same document always on this page and might change this way from left to right page. If you want to copy from a facing left to a right page in place you can select the wanted page in the Pages Panel (blue highlight frame) before pasting.
4) Copy and Paste transformation values? 
I'm not sure I understand your point of view. You can select different objects in a spread and use the Alignment functions to set their x/y coordinate to one same value. You can not set a value in the transformation window for a bunch of selected objects but only for them as a group, keeping the relative distance to each other.
(p.s.: Affinity has announced that enable Scripting is in planned/in preparation, so sooner or later the selected objects may be movable in a more customizable way by using a script.)
 
 

Hi big smile,
Welcome to Affinity Forums
Assuming it's an editable text layer in the original PSD file, yes. Go to Affinity Photo/Publisher Preferences, General section and tick Import PSD text as text rather than bitmap to import the text as editable text rather than a non-editable raster layer. Then import the PSD file again.

I don't think there's a keyboard way to do that, but if you select all those layers it's just 1 short mouse drag to put them into your new layer.

Image files (PNG, TIFF, JPEG) can be either linked or embedded, as stated.
Document files (the others mentioned) can also be linked or embedded, but currently, even when linked, an embedded copy is kept in the Publisher document.
What specific problem are you trying to solve?

Place multiple times, or copy imported PDF to several instances. Select presented PDF page from Context toolbar.

Unfortunately not currently, placing a PDF will always display 1 page only - my apologies.
However you can always use File>Open to parse your PDF as a new document, which will open all pages of the document, you should then have access to Master Pages in the top left of the Pages Studio.

There's nothing specifically like that in Publisher. However, if the content was laid out using Master Pages then when you adjust the position of an item on the Master Page it will adjust on all the relevant document pages, too. That's really the intended workflow process for Publisher, I think.

What Walt advises would be the best way to do this but if you have a document that does not use master pages or where you have pages that have lots of non-master page items on different pages then you could try this...
Select a page and in Spread Setup, select All Spreads then resize the document so it is 10mm smaller (height) than before but first use the Scaling Tab to set the option Anchor to Page and set the appropriate Anchor point (bottom middle node) so that the page height is removed from the top of the page relative to all objects on the page.
Once you do that you should have shaved 10mm off the top of your pages but your page will now be 10mm smaller (height) than you need
So just repeat the process but now make the page 10mm taller, this time reversing the Anchor point (use top middle node) so no page objects move and you are just adding 10mm to the bottom of the page
It should work but not tested with complex documents or stuff like bleed and margins 
PS Don't forget to adjust (or do the same for) any Master pages if you have to