Manual of PlantcircBase
By inputing the organism, chromosome, start site and end site, all circRNAs in the database (as well as unknown circRNAs with poaition information) can be visualized in a "circular format" or a "linear format" based on the genomic sequences with annotation. Different genomic components (CDS, intron, exon and UTR) are color coded. In the left figure, the line with arrow represents the direction of transcripts. The vertical line with two numbers represents the back-splicing site of the circRNA. In the right figure, the grey area represents the exact position of the circRNA within its parent gene.
For the two pictures above, the left is in "circular format" and the right is in "linear format" of the circRNA whose position is from 3768053 to 3768717 on the 5th chromosome of Oryza sativa.