Folks,
Hugen has built several up-to-date (as of Oct 3, 2019) versions of his Antenna Analyser (AA) firmware for the NanoVNA.
These have the thicker fonts that are easier to read.
The entire drive download is 20MB and contains a lot of older files, so you may want to only D/L what you need.
On the Google drive here:
bin, hex & dfu files:
NanoVNA-H__900_ch_20191003
NanoVNA-H__900_aa_20191003
NanoVNA-H__800_ch_20191003
NanoVNA-H__800_aa_20191003