[Galaxy S6 General] asc1977:
How to build 0.25x anmimation scale in developer options

Decompile SecSettings.apk and navigate to res/values/arrays

find:

<string-array name="window_animation_scale_entries">
<item>Animation off</item>
<item>Animation scale 0.5x</item>
<item>Animation scale 1x</item>
<item>Animation scale 1.5x</item>
<item>Animation scale 2x</item>
<item>Animation scale 5x</item>
<item>Animation scale 10x</item>
</string-array>
<string-array name="window_animation_scale_values">
<item>0</item>
<item>.5</item>
<item>1</item>
<item>1.5</item>
<item>2</item>
<item>5</item>
<item>10</item>
</string-array>
<string-array name="transition_animation_scale_entries">
<item>Animation off</item>
<item>Animation scale 0.5x</item>
<item>Animation scale 1x</item>
<item>Animation scale 1.5x</item>
<item>Animation scale 2x</item>
<item>Animation scale 5x</item>
<item>Animation scale 10x</item>
</string-array>
<string-array name="transition_animation_scale_values">
<item>0</item>
<item>.5</item>
<item>1</item>
<item>1.5</item>
<item>2</item>
<item>5</item>
<item>10</item>
</string-array>
<string-array name="animator_duration_scale_entries">
<item>Animation off</item>
<item>Animation scale 0.5x</item>
<item>Animation scale 1x</item>
<item>Animation scale 1.5x</item>
<item>Animation scale 2x</item>
<item>Animation scale 5x</item>
<item>Animation scale 10x</item>
</string-array>
<string-array name="animator_duration_scale_values">
<item>0</item>
<item>.5</item>
<item>1</item>
<item>1.5</item>
<item>2</item>
<item>5</item>
<item>10</item>
</string-array>

change to:

<string-array name="window_animation_scale_entries">
<item>Animation off</item>
<item>Animation scale 0.25x</item>
<item>Animation scale 0.5x</item>
<item>Animation scale 1x</item>
<item>Animation scale 1.5x</item>
<item>Animation scale 2x</item>
<item>Animation scale 5x</item>
<item>Animation scale 10x</item>
</string-array>
<string-array name="window_animation_scale_values">
<item>0</item>
<item>.25</item>
<item>.5</item>
<item>1</item>
<item>1.5</item>
<item>2</item>
<item>5</item>
<item>10</item>
</string-array>
<string-array name="transition_animation_scale_entries">
<item>Animation off</item>
<item>Animation scale 0.25x</item>
<item>Animation scale 0.5x</item>
<item>Animation scale 1x</item>
<item>Animation scale 1.5x</item>
<item>Animation scale 2x</item>
<item>Animation scale 5x</item>
<item>Animation scale 10x</item>
</string-array>
<string-array name="transition_animation_scale_values">
<item>0</item>
<item>.25</item>
<item>.5</item>
<item>1</item>
<item>1.5</item>
<item>2</item>
<item>5</item>
<item>10</item>
</string-array>
<string-array name="animator_duration_scale_entries">
<item>Animation off</item>
<item>Animation scale 0.25x</item>
<item>Animation scale 0.5x</item>
<item>Animation scale 1x</item>
<item>Animation scale 1.5x</item>
<item>Animation scale 2x</item>
<item>Animation scale 5x</item>
<item>Animation scale 10x</item>
</string-array>
<string-array name="animator_duration_scale_values">
<item>0</item>
<item>.25</item>
<item>.5</item>
<item>1</item>
<item>1.5</item>
<item>2</item>
<item>5</item>
<item>10</item>
</string-array>

Now....Depending on your country, you may have have to navigate to a separate folder. But for the US, go to Res/values-en-rUS/Arrays and do same as above for the country you want or for all you find

thx [MENTION=4854133]bajasur[/MENTION]