Which project file holds the Arduino setting for flash size?

Projects Programming
4

Juraj:
Installed Sloeber Arduino IDE - need some startup instructions - #12 by Juraj - Libraries - Arduino Forum

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!)