Code change:
const showFoldingControls = this._computeShowFoldingControlsOption(); // const { bottomToolbarGap, bottomToolbarHeight } = this._computeBottomToolbarDimensions(compactView, insertToolbarPosition, insertToolbarAlignment); const fontSize = this.configurationService.getValue<number>('editor.fontSize'); <del> const outputFontSize = this.configurationService.getValue<number>(NotebookSetting.outputFontSize) || fontSize; const outputFontFamily = this.configurationService.getValue<string>(NotebookSetting.outputFontFamily); </del> const markupFontSize = this.configurationService.getValue<number>(NotebookSetting.markupFontSize); const editorOptionsCustomizations = this.configurationService.getValue(NotebookSetting.cellEditorOptionsCustomizations); const interactiveWindowCollapseCodeCells: InteractiveWindowCollapseCodeCells = this.configurationService.getValue(NotebookSetting.interactiveWindowCollapseCodeCells); <del> const outputLineHeight = this._computeOutputLineHeight(); </del> <ins> // TOOD @rebornix remove after a few iterations of deprecated setting let outputLineHeightSettingValue: number; const deprecatedOutputLineHeightSetting = this.configurationService.getValue<number>(NotebookSetting.outputLineHeightDeprecated); if (deprecatedOutputLineHeightSetting !== undefined) { this._migrateDeprecatedSetting(NotebookSetting.outputLineHeightDeprecated, NotebookSetting.outputLineHeight); outputLineHeightSettingValue = deprecatedOutputLineHeightSetting; } else { outputLineHeightSettingValue = this.configurationService.getValue<number>(NotebookSetting.outputLineHeight); } let outputFontSize: number; const deprecatedOutputFontSizeSetting = this.configurationService.getValue<number>(NotebookSetting.outputFontSizeDeprecated); if (deprecatedOutputFontSizeSetting !== undefined) { this._migrateDeprecatedSetting(NotebookSetting.outputFontSizeDeprecated, NotebookSetting.outputFontSize); outputFontSize = deprecatedOutputFontSizeSetting; } else { outputFontSize = this.configurationService.getValue<number>(NotebookSetting.outputFontSize) || fontSize; } let outputFontFamily: string; const deprecatedOutputFontFamilySetting = this.configurationService.getValue<string>(NotebookSetting.outputFontFamilyDeprecated); if (deprecatedOutputFontFamilySetting !== undefined) { this._migrateDeprecatedSetting(NotebookSetting.outputFontFamilyDeprecated, NotebookSetting.outputFontFamily); outputFontFamily = deprecatedOutputFontFamilySetting; } else { outputFontFamily = this.configurationService.getValue<string>(NotebookSetting.outputFontFamily); } const outputLineHeight = this._computeOutputLineHeight(outputLineHeightSettingValue, outputFontSize); </ins> const outputScrolling = this.configurationService.getValue<boolean>(NotebookSetting.outputScrolling); const outputWordWrap = this.configurationService.getValue<boolean>(NotebookSetting.outputWordWrap); const outputLineLimit = this.configurationService.getValue<number>(NotebookSetting.textOutputLineLimit) ?? 30;

Related discussion:
text: Testing There are "" "notebook.outputLineHeight" "" "notebook.outputFontFamily" "notebook.outputFontSize" Ideally these would be all namespaced or prefixed .
This affects how they show up in the settings editor UI, btw: <img width="919" alt="image" src="https://user-"