最强图片预览工具JPEGView 关闭自动全屏模式

窗口右键 → 设定/管理 → 编缉用户设置：

搜索ShowFullScreen 并设置为false：

BASIC

; -----------------------------------------------
; - WINDOW BEHAVIOR OPTIONS
; -----------------------------------------------

; Start in full screen or windowed mode
; 'true' or 'false' to always start in full screen, respectively windowed mode
; 'auto' to choose best mode depending on image size of first image - windowed when it is small, full screen when it is large
ShowFullScreen=false