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-rw-r--r--tools/recovery_l10n/README.md2
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diff --git a/tools/recovery_l10n/README.md b/tools/recovery_l10n/README.md
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--- a/tools/recovery_l10n/README.md
+++ b/tools/recovery_l10n/README.md
@@ -25,6 +25,8 @@
25 * "pngcrush -c 0 ..." converts "text-out.png" into a 1-channel image, 25 * "pngcrush -c 0 ..." converts "text-out.png" into a 1-channel image,
26 which is accepted by Recovery. This also compresses the image file by 26 which is accepted by Recovery. This also compresses the image file by
27 ~60%. 27 ~60%.
28 * zopflipng could further compress the png files by ~10%, more details
29 in https://github.com/google/zopfli/blob/master/README.zopflipng
28 * If you're using other png compression tools, make sure the final text 30 * If you're using other png compression tools, make sure the final text
29 image works by running graphic tests under the recovery mode. 31 image works by running graphic tests under the recovery mode.
30 32