Hi Jllanos, Welcome to EasyEDA. * To swap a component from top (bottom) to bottom (top) layer: https://easyeda.com/Doc/Tutorial/PCB.htm#Footprint-attributes * To connect each amplifier in the OpAmp to the power supply at pins V+ (4) and V- (11 ). You can connect things together in EasyEDA either using Wires or using netlabels. Pins and wires with the same netlabel are connected together: https://docs.google.com/document/u/1/d/1OWZVVFRAe_2NW3WratpkA_SGuHa5AcRow5ZRfvcoVTU/pub#h.2jxsxqh So, you either: a) have to connect the pins 4 and 11 on each symbol to the power supply using wires or b) add a netlabel to the positive supply (e.g. VCC) and one to the negative supply (e.g. VEE) then add the same netlabels to each of the supply pins on each opamp symbol. BTW, you don't normally include the +/-14V supply sources in a non-simulation schematic that is intended to be passed into PCB layout unless they are some sort of PSU module, battery (or battery holder) that can be mounted on the PCB. I am not aware of any 14V batteries that are available in the package you have selected for them. I think you probably need to remove the sources themselves and replace them with a simple 3 pin connector, HDR1X3, from the EasyEDA Libs in the left hand panel and then assign an appropriate package. You also need to add some sort of connector for the ground, triangle and squarewave outputs (even if it is only a single pin HDR1X1 to define a plated through hole to connect an off-board wire for each output and one or more associated ground wires). (If you are trying to simulate the design then before you pass it into PCB, you must make a copy of the schematic with the voltage sources removed and the connectors added and then use the copy to pass into PCB. You can still assign packages and add BoM information to the simulation schematic before you strip out the voltage sources and add the connectors but don't forget to add package and BoM info to the connectors in the copy.) You also need to add power supply decoupling of two at least a 10uF electrolytic bulk decoupling caps, one across each supply rail to ground plus two 100nF ceramics, one directly across pin 4 to ground and one across pin 11 to ground. (You don't need to bother about supply decoupling in a *simulation* schematic if the supplies comes from ideal voltages sources but they *must* be there in a non-simulation schematic.)

@andyfierman Thank you so much for your help. i'll make all those changes in my circuit and thanks for reminding me the output connectors for the square and triangular wave. Was very helpful your information. Thanks again.