Try the view scale, this is likely to be the issue 🙂 Go to the bottom of the view screen, and 4th tab from the left in is the scale - alter this to select a scale that works for your view and the text/dimensions should scale accordingly, hope this helps.
Usually you don't X-REF files into AC since then you get a bunch of autocad cruft in the file.
Best way is to place the file in the worksheet using File-> External Content -> Place External Drawing then if you need to change the scale you will get the error but relinking (or right click Update) should fix the text size.
You can try relinking the X-Ref or Updating to see if it works too.
eduardo rolón AIA NCARB Another of the forum moderators. Macbook Pro 2.4 i9 32GB ram OS X 10.XX latest AC25 US/INT -> AC08
thanks for your reply, I will try to apply your solution and I let you know.
However and for what I understood, using your approach I cannot locate the file on ITM - Irish Transverse Mercator - Coordinates, which is no more no less the Irish version of the international coordinates. - UTM -
Unfortunately it is a standard use, in Ireland to work inside this system, and all the others consultants work with them and they send to me file in DWG.