Kindle firmware 5.13.2

[Waylander]

Wish they'd update the font size options to allow for a greater level of size choices. On my Oasis3 Bookerly on 3 is too small and 4 is too big.

[JSWolf]

Originally Posted by ps67

I don't remember if negative margins works also with KFX. And of course if You download directly from Amazon You can't change anything.

Anyway IMHO the last 2 great improvements of Kindle firmware are when they allowed custom fonts and when they introduced the possibility of increasing the sharpness of the font.

After that I have seen only cosmetic changes.

Yes, negative margins do work with KFX. I've tested it with 5.13.2. I've set the margins to 45px and I think that works well for a 6" 300DPI screen.

[JSWolf]

Originally Posted by ps67

The solution for all needs should be to increase the margin choices. Only 3 is too little.

But knowing Amazon, we'll go from...
very large
too large
insanely large
to...
Even more large then insanely large
And line height will get larger as well.

Amazon wants to set things so they don't work well in real situations with real people. I cannot see why Amazon cannot add smaller margins. Marby 1/2 the size of the smallest margins. Also, the line height should be 1/2ed as well. I'm ot saying to drop the current settings, but add more.

As as for the font sizes, I would added sizes in between each setting, I do know that some find one size too small and the next up too large.

[Dr. Drib]

Originally Posted by Waylander

Wish they'd update the font size options to allow for a greater level of size choices. On my Oasis3 Bookerly on 3 is too small and 4 is too big.

That's an issue I'm also having with my Oasis 3 using Bookerly. (That's why I don't use this font on this specific Amazon model.) I imagine there's an elegant solution using calibre. Perhaps a calibre expert can offer a simple solution...

[hius07]

Originally Posted by Waylander

Wish they'd update the font size options to allow for a greater level of size choices. On my Oasis3 Bookerly on 3 is too small and 4 is too big.

Have you tried the FONT_RAMP tweak?
https://www.mobileread.com/forums/sh...93#post3060893

You need FONT_RAMP with 14 grades, such as attached.

[Waylander]

Have you tried the FONT_RAMP tweak?
https://www.mobileread.com/forums/sh...93#post3060893

You need FONT_RAMP with 14 grades, such as attached.

Thankyou, I'd forgotten bout this. How do I use this FONT_RAMP tweak?

[hius07]

Originally Posted by Waylander

Thankyou, I'd forgotten bout this. How do I use this FONT_RAMP tweak?

https://www.mobileread.com/forums/sh...62#post3775162
As you need the size between 3 and 4 - just change, for example, the first four figures
6.96 7.92 8.4 9.36
to something like
8.4 8.8 9.2 9.36
Your new sizes from 1 to 4 will be within old 3 - 4 interval.

Sorry, I cannot find default values for KOA3, you need to try.

[shamanNS]

@Waylander
You just copy FONT_RAMP file to root (= top level) of Kindle drive and then restart your Kindle and that is it. Then just use Aa menu as always. You tweak the values, copy the file, restart Kindle and test the results on your Kindle untill you find the sweet spot for you.

One thing to keep in mind: FONT_RAMP thing is in effect only for books in KF8 (= azw3) format, mobi and KFX would still used default/factory values.

If your Kindle is jailbreak-ed and you are comfortable with doing a tiny edit of a single .jar you can redefine font sizes for books in KFX format :

https://www.mobileread.com/forums/sh...postcount=1850

You would have to repeat that edit after every Kindle firmware update if you don't prevent your Kindle from updating.

edit: Here are the default font values:
https://www.mobileread.com/forums/sh...&postcount=153

[trekk]

Originally Posted by Waylander

Thankyou, I'd forgotten bout this. How do I use this FONT_RAMP tweak?

If you want to calculate the values for different devices, take a look here: https://www.mobileread.com/forums/sh...&postcount=111

[Waylander]

Thankyou both. I've got FONT_RAMP working and am playing around with the various scales. Should make Bookerly readerble again on my Oasis3

[Waylander]

So, I used this font scale:

7.80 8.00 8.35 8.85 9.00 9.25 9.60 9.99 10.64 10.95 11.15 11.50 11.75 12.66

Now, Bookerly size 4 on my Oasis3 is the same as Bookerly size 3 on my PW4, which is perfect for me.

[shamanNS]

Some of those increments look little to close and I wouldn't be surprised if changing from 1st to 2nd or from 4th to 5th size results in no (visible) change in font size...

[j.p.s]

Originally Posted by shamanNS

Some of those increments look little to close and I wouldn't be surprised if changing from 1st to 2nd or from 4th to 5th size results in no (visible) change in font size...

I agree. The difference needs to be at least 0.33 or 0.34 to change the size by one pixel, but smaller changes might affect anti-aliasing. Maybe worth a bit of study.

[melksnor]

Originally Posted by Waylander

So, I used this font scale:

7.80 8.00 8.35 8.85 9.00 9.25 9.60 9.99 10.64 10.95 11.15 11.50 11.75 12.66

Now, Bookerly size 4 on my Oasis3 is the same as Bookerly size 3 on my PW4, which is perfect for me.

Can I ask where you got that? That's my font_ramp! I reached it experimentally through trial and error in 4 rounds

Sometimes two are close, but you will see a difference in words fitting on one sentence or sentences fitting on the screen.

I basically aimed for a the smallest and largest fonts I would find usable and then tried to set steps in between.

    original
    6.96 7.92 8.4 9.36 10.56 11.52 12.48 13.92 15.36 17.04 19.2 22.08 25.2 29.28

    try 1
    7.11 7.55 8.22 8.77 9.33 9.99 10.44 11.05 11.55 12.66 13.77 14.88 15.99 17.11

    try 2
    7.75 8.00 8.25 8.75 9.25 9.99 10.64 10.85 11.05 11.75 12.66 13.77 14.58 15.99

    try 3
    7.75 8.00 8.25 8.75 9.00 9.25 9.60 9.99 10.64 10.95 11.15 11.50 11.75 12.66

    try 4
    7.80 8.00 8.35 8.85 9.00 9.25 9.60 9.99 10.64 10.95 11.15 11.50 11.75 12.66

[DuckieTigger]

Originally Posted by melksnor

Can I ask where you got that? That's my font_ramp! I reached it experimentally through trial and error in 4 rounds

Sometimes two are close, but you will see a difference in words fitting on one sentence or sentences fitting on the screen.

I basically aimed for a the smallest and largest fonts I would find usable and then tried to set steps in between.

    original
    6.96 7.92 8.4 9.36 10.56 11.52 12.48 13.92 15.36 17.04 19.2 22.08 25.2 29.28

    try 1
    7.11 7.55 8.22 8.77 9.33 9.99 10.44 11.05 11.55 12.66 13.77 14.88 15.99 17.11

    try 2
    7.75 8.00 8.25 8.75 9.25 9.99 10.64 10.85 11.05 11.75 12.66 13.77 14.58 15.99

    try 3
    7.75 8.00 8.25 8.75 9.00 9.25 9.60 9.99 10.64 10.95 11.15 11.50 11.75 12.66

    try 4
    7.80 8.00 8.35 8.85 9.00 9.25 9.60 9.99 10.64 10.95 11.15 11.50 11.75 12.66

You must have posted it on reddit. Look here: https://amp.reddit.com/r/kindle/comm...ith_font_ramp/