The invention claimed is:1. An imaging apparatus, comprising:a body;a display panel on the body, the display panel configured to:pivot on an axis of the body between a first state and a second state, wherein a display surface of the display panel is oriented towards a back side of the body in the first state, and the display surface is oriented towards a front side of the body in the second state, wherein the front side is a subject side of the body, and the front side is opposite to the back side in an optical axis direction;a direction selector configured to operate both in a clockwise direction and in a counterclockwise direction; andcircuitry configured to:control the display panel to display a levelness indicator that indicates an inclination of the body based on the display panel that is in the first state,control the display panel to display the levelness indicator inversely based on a change of the first state to the second state,control the display panel to display a menu that is varied based on the operation of the direction selector,wherein the variation of the menu is in a first direction based on the display panel that is in the first state, and the variation of the menu is in a second direction different from the first direction based on the display panel that is in the second state.2. The imaging apparatus according to claim 1, further comprising a plurality of operation buttons, whereinthe circuitry is further configured to:control the display panel to vary display information displayed on the display panel, based on an operation of an operation button of the plurality of operation buttons, andswitch a first correspondence relationship, wherein the first correspondence relationship is a relationship between the operation of the operation button and a display mode in which the display information is displayed, and wherein the first correspondence relationship is switched between the first state and the second state.3. The imaging apparatus according to claim 1, wherein the direction selector is at least one of a control ring or a control wheel.4. The imaging apparatus according to claim 2, wherein the circuitry is further configured to control the display panel to vary the display information based on a position of the operation of the operation button, andswitch a second correspondence relationship, wherein the second correspondence relationship is a relationship between the position of the operation and the display mode in which the display information is displayed, and wherein the second correspondence relationship is switched between the first state and the second state.5. The imaging apparatus according to claim 1, further comprisinga viewfinder in the body, the viewfinder is configured to pop up from the body when in use, wherein the circuitry is further configured to cause the display panel to switch a display mode based on whether the viewfinder is contained in the body and based on the display panel that is in the second state.6. The imaging apparatus according to claim 5, wherein the circuitry is further configured to control the display panel to display shooting information in a first region of the display panel, based on the display panel that is in the second state and based on the viewfinder that is popped-up from the body, wherein the first region is different from a second region of the display panel, and wherein the second region is a region on which the viewfinder overlaps the display surface in a view from the subject side.7. The imaging apparatus according to claim 1, wherein the circuitry is further configured to control the display panel to:display shooting information based on the display panel that is in the first state, anddisplay the shooting information inversely in a top-bottom display direction and a left-right display direction with respect to display directions of the shooting information, based on the change of the first state to the second state.8. The imaging apparatus according to claim 7, wherein the shooting information comprises a live-view image of a subject.9. The imaging apparatus according to claim 7, wherein the shooting information comprises an icon-like object.10. The imaging apparatus according to claim 5, wherein the viewfinder is further configured to move in a direction towards the back side of the body.11. The imaging apparatus according to claim 1, further comprising an eye sensor configured to detect a gaze of a user.12. The imaging apparatus according to claim 1, wherein the menu is an arch-like menu.13. A camera, comprising:a body;a viewfinder in the body, wherein the viewfinder is positioned outside the body when in use;a display panel on the body, the display panel configured to:pivot on an axis of the body between a first state and a second state, wherein a display surface of the display panel is oriented towards a back side of the body in the first state, and the display surface is oriented towards a front side of the body in the second state, wherein the front side is a subject side of the body, and the front side is opposite to the back side in an optical axis direction; andcircuitry configured to:control the display panel to:display shooting information in a first region of the display panel, based on the display panel that is in the second state and based on the viewfinder that is outside the body,wherein the first region is different from a second region of the display panel, and wherein the second region is a region on which the viewfinder overlaps the display surface in a view from the subject side.