Single scale visualizations display a genome from a single perspective - one size. However, some single scale visualizations provide a zooming interaction, which allows the user to expand or shrink the genome view.
3D Genome Browser 3dViewer AliView Alvis BactoGenie CGView CGView Server Cinteny Circos Civi ClicO Free Service Combo Dalliance Deep Motif Dashboard deepTools Heatmap DNAPlotter EaSeq Edgar Circular Plot Edgar Genome Browser Edgar Synteny Matrix Edgar Synteny Plots EnrichedHeatmap EpiViz Galaxy HiCExplorer GenomeRing GenomeView GenPlay Gepard ggBio GView HilbertCurve HilbertVis HUGIn IRScope J-Circos JalView JBrowse JuiceBox Lollipop Plot cBio MAGI MEXPRESS MGcV MSAViewer NCBI Genome Viewer ngs.plot pLogo PSU 3D Genome Browser ReadXplorer Rondo Sashimi Plot Savant Genome Browser 2 Sequence Bundles Sequence Surveyor SpliceGrapher SplicePlot SpliceSeq SynMap2 SynteBase and SynteView Synteny Explorer Two Sample Logo UCSC Genome Browser Variant View Vials Vista Dot Vista Synteny VistaPoint WashU Epigenome Browser WebLogo
A multiple scale visualization allows for visualizing data from multiple perspectives/sizes at once. This can be useful for something as large as a genome, particularly being able to view individual genes as well as the geneome on a whole, as scaling would allow.