Which border changes in French Indochina in Thailand's favor was France considering making in 1939-1940?

[Futurist]

Which border changes in French Indochina in Thailand's favor was France considering making in 1939-1940? On Wikipedia, it says this:

https://en.wikipedia.org/wiki/Franco-Thai_War

"Negotiations with France shortly before World War II had shown that the French government was willing to make appropriate changes in the boundaries between Thailand and French Indochina, but only slightly."

So, just how much Indochinese territory--and which ones--was France actually willing to give Thailand in 1939-1940?

[Loïc]

hum...nothing I think...or as said "only slightly" because it was not really question of territory but only agreement along the quite shifting Mékong including islands subjects to change placed closer to French Indochina or Thaïland by the course of the Mékong and so these subsequents corrections for more clear boundaries

[Futurist]

hum...nothing I think...or as said "only slightly" because it was not really question of territory but only agreement along the quite shifting Mékong including islands subjects to change placed closer to French Indochina or Thaïland by the course of the Mékong and so these subsequents corrections for more clear boundaries

So, before the Fall of France in 1940, Thailand had absolutely no hope of acquiring territorial revisions on the scale that it temporarily managed to acquire during World War II?

[Loïc]

French Authorities were not ready to satisfy such larges territorial concessions even with the defeat in Europe, and without the following war with Thaïland and the peace under Japanese pressures