there is an obsidian plugin for scrolling with ctrl + up/down , but it is not in the plugin installer, here is a link of the plugin repo: GitHub - martixy/obsidian-ctrl-arrow-scroll: Ctrl + Up/Down arrow scrolls view line by line instead of moving cursor., clone this repo in .obsidian/plugins, then go inside that folder and run npm install then npm run build, this will get the plugin installed, you can go and enable it from obsidian community plugins in the settings