If your Acrobat file was too small to read, you need to reset the VIEW option.  See the picture below – yours is probably set to “actual size.”  Check the “fit width” option instead.  Note:  These pictures are taken from the Professional Version of Adobe Acrobat (not the typical Acrobat Reader program) so your screen may have fewer icons.  The notes refer to features available in all Acrobat products.

When you are looking at a document, you can “zoom in” and make the print bigger by adjusting the number in the magnification box.  See sample below that show magnification up to 130%.

To “save” files from the PDF document, click on the floppy disk icon, not the normal “File”/”Save As” from your Microsoft Internet Explorer top bar.

To “print” files from the PDF document, click on the printer icon, not the normal “File”/”Print” from the top bar.  See the row that starts with an open folder icon above.