Perdon decia que ... gracias lo he hecho lo que me indicaste y hay una mejor calidad en el texto que es casi idéntica a la original.
Una última pregunta ... en la configuración, dejo todo exatamente igual o modifico algo para mejorar y prepara mis archivos en la mejor calidad y menor tiempo posible??
The dialog boxes are in Spanish and the settings look different than mine, so it's a little difficult for me, but from what I can see, all of your settings look good and you don't need to change anything.
I have a couple of comments, but they will not alter the quality.
Activar siempre accesibilidad y reflujo: This setting doesn't hurt anything, but since you have an image, it is not necessary to have it turned on.
Hacer conpatible con Acrobat 7 y posterior: You can reduce the size of the PDF by choosing a higher compatibility. For example, Acrobat 9 or 10 would give you a smaller file size than Acrobat 7.