But you do the same as in e-mail - get pdf that can be downloaded and signed. Online signing is not and cannot be embedable feature more that this.

Hi! Can you please provide a little bit more information regarding the printing of this color: 1. Where (which continent on the globe) you will print? 2. On what material you want to print (coated paper, uncoated paper, plastics, etc.)? 3. What kind if technology will be most often be used for printing (offset, digital inkjet, digital toner, office printers, heatset, etc.)?

Have you tried to change zoom level?

Is the same master page applied to these 2 pages?

Select first text block (override master page item), then cut and paste it in place.

It would be good to know what languages you are talking about. I'm quite sure you are not willing cover all the worlds written scripts.

Please add info about the gradient, gradient file wold be the best. 1st color value, 2nd color value, color space, length of gradient.

For this particular device you can't do anything as driver do not allow to change resolution: Print: Main; 1,200 dpi × Sub; 1,200 dpi

It's actually not true. If you would share the name and model of the device you want to print on and also RIP or operational software you are using to control the printer, answer would be much easier to get.

Color precision is must.

I would say that nowdays PDF/X-4 would be much more better idea. And yes, no sepatation is needed from your side, repro inhouse will do that for particular printing press.

It will not be that exact. Rasterised effect scaling can lead to destruction of the smoothness of the gradients. Bad idea.

On what software are you viewing PDF files? It is very common that default viewers don't support color management. I suggest you to try view files with Adobe Acrobat and came back with results.