Which project file holds the Arduino setting for flash size?

I need to backtrack in my project to the setting for flash size used before I switched to the ESP-07S module.
For this new module I am using 4M (1M SPIFFS).

But the old ESP-07 module has only 1M flash so it used a different setting.
I have put my project under Subversion so there is a chance to find the old setting now that I will have to revert.
But I don't know which of the many files contain the actual Arduino properties for the project.
I am using Sloeber IDE if it matters for this question.
Does someone here know how to find the old properties (=which file they are stored inside)?

boards.txt in hardware/arduino/avr in the distribution I think. look for 'maximum_size'. I've clone a set of entries in the past in order to vary one of the settings - keep a copy of the original boards.txt safe of course(!)

(Actually it probably won't be the avr directory, thinking about it...)

I wish there was a way to specify which board at the top of the sketch sometimes (or maybe
that exists now, I don't have the latest version)

Juraj:
http://forum.arduino.cc/index.php?topic=534572.msg3646421#msg3646421

OK, the entries I found in .settings/org.eclipse.cdt.core.prefs regarding flash are these:

environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.FLASH_SIZE/delimiter=;
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.FLASH_SIZE/operation=replace
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.FLASH_SIZE/value=1M
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.FLASH_SIZE_BYTES/delimiter=;
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.FLASH_SIZE_BYTES/operation=replace
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.FLASH_SIZE_BYTES/value=0x100000

I knew beforehand that it was a 1M setting so looking for SPIFFS and found these lines:

environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_BLOCKSIZE/delimiter=;
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_BLOCKSIZE/operation=replace
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_BLOCKSIZE/value=4096
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_END/delimiter=;
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_END/operation=replace
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_END/value=0xFB000
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_PAGESIZE/delimiter=;
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_PAGESIZE/operation=replace
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_PAGESIZE/value=256
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_START/delimiter=;
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_START/operation=replace
environment/project/io.sloeber.core.toolChain.release.1788901504/A.BUILD.SPIFFS_START/value=0xEB000

Is PAGESIZE what I need and this means I have a setting 1M (256K SPIFFS) ?
(Thank you Subversion and Juraj!)

no page size is something else. start and end address give you the size

OK then it is 64K SPIFFS...
FB000-EB000=10000